DD is for Doubly Delicious!!
It happens more times than I care to remember. I have to say the media with porn, sitcoms and comedians joking about men’s sizes have most assuredly rocked every guy’s self-image into wondering what is normal for size. Since science and medicine say what their findings are, many disagree and argue with scientific fact, a side effect of a desensitized society inundated by porn and corporations telling you what is pretty and what is normal.
It is the shape, that matters, really. The size is practically irrelevant. Thus far I have seen no scale or distinction between different shapes. Also, I believe that one can shape the shape (no pun intended) to some extent. 
Normal in that category for Caucasian males is about 6 inches, Hispanics about 5 inches, Asians about 4 inches, and “Africans” about 7 inches. Overall, the average is 4-6 inches, though. (One reason why my wife and I are both happy I’m anything but average…lol) Also, as for porn’s influence on our collective sexual expectations, you would be surprised at how often prosthetics are being used these days. Flesh colored penis sheathes are used all the time now in the porn industry; a dead giveaway often being a “well hung” man who has to hold the base of his “penis” the entire time, and/or who displays an excessive amount of “semen” during “climax”. (You’ll know it when you see it…don’t ask. lol)
As for the topic at hand, however, I would say the perfect breast size is one that is just about a handful. Anything less, and it tends to be disappointing, anything more, and you end up having to play fetch every time your grip slips. That being said, I have become spoiled by my (5’3") wife’s G’s, and may find myself hard pressed to replace them should we ever break up. 
I also have to second the opinion others put forward on here that breasts are at their best when they are natural, well rounded, and have full, sensitive nipples. I have been with women over the years that had everything from massive breasts with teeny tiny nipples that almost blended in with the areola, and women who had tiny breasts and enormous, inch long nipples that could only rarely be hidden behind even the best garments, and what I have found is that I like something in between… breasts big enough to create ample cleavage, with nipples big enough to notice through clothing when aroused, and just sensitive enough to be responsive to a wide range of stimuli without being overwhelming for the woman.
There is one truly critical factor in my mind to choosing the “perfect pair” that isn’t related to size or shape at all, though… the woman the breasts are attached to needs to enjoy having them looked at and/or played with. You’d be surprised how many women aren’t into either due to being self-consciousness about them. lol
I agree the media can distort lots of thing but most people know what feels good and what doesn’t.
The average vagina is only 3 to 4 inches deep from opening to cervix. It can stretch to 4 to 7 inches if something is present to stretch it but it generally conforms to the object that is causing pressure.
People often think its a continuous hole that reaches the uterus. Its not. So unless your shorter then 3 to 4 inches hard your not small. If your larger then average its going to bruise the cervex causing discomfort.
Girth on the other hand can be more painful. The average girth of a women of childbearing age is 3 inches and its not as stretchable. Even though we pass a child out of that hole, during pregnancy hormonal changes cause our body to ready for stretching and become more pliant.
Firmness is far more important then both size and girth. If you dont get a true hard on thats going to be unsatisfying for most women. Longevity is another factor. It takes most women a longer time to reach orgasm then men.
Not going to lie and say that size makes absolutely no difference though. But to big is not good either. As long as you fall in the nornal range and you have sexual skills then it shouldnt matter.
Tisha
Honestly, as long as its not completely flat, wildly assymetrical, or going to crush me I’m good to go.
I’m more of an ass and legs guy.
I am more the type that really doesn’t care at all about breast size, not really going to influence my decision in a girl at all, I think we need one more options for don’t really give a shit. And like Apoplectic more of an ass and leg guy but again not going to change my mind because of that either.
I like tall thick chicks. Not chubby, but not skinny.
They generally have rather large… Assets. So anything from a C and up is my “ideal” size. However all breasts are great, so yeah, A and B aren’t too bad
Squeezing boobs could prevent or reduce breast cancer-
To revert breast cancer cells, give them the squeeze
I love a girl who is skinny, not uber skinny but like 100-115 pounds skinny, one who is half my bodyweight whome i can pick up and carry around.
I love to pick up lasses just for fun and during intimate moments to do the “stand and carry” which is the shite
Breast Size B all the way with some perky nipples.
Flat Belly or slight 6 pack is great on her.
I like C cups - they’re a good handful size - but when you meet a girl with natural Ds that it works for…yeah
For years, my wife has been telling me that she wears a 44g. But she was recently fitted (by the folks who have the reality show “Double Divas”) and it turns out she was wrong! She’s actually a - get this - 40K!!
I have some explicit online photos where you can take a look at her marvelous breasts. Moderators, can I post a link to my Flickr page here?
To me, her breasts are perfect. I would never be happy with an average woman’s breasts anymore.
I am one lucky man!!
They are all good. All of them. Every last one of them. You know what they say…“You seen one set of tits, you want to see them all!”
Would depend on the nature of the scar, I’d say. Personally, I’d like to think it wouldn’t make a difference for me - other than that I’d want to hear the story
Naked breasts are always a turn on…would just have to kiss your owies 
Higher A/Lower B depending on body frame.
Wow, I’d say this thread is a hit haha, been gone for a minute and it’s still chugging along. Very informative about sizes (not just boobies.)
yeah mines C cup size and that’s fun
Mid-range is fine but her responsiveness is the the most important feature.
I’ve had lovers who could orgasm just from my kissing their nipples.
From my position, I do love the feel of breasts against my chest during missionary position.
But then, I’m more of an ass man since there’s where the babies are made and carried.
I probably don’t belong here…men talk and all …but I’ll vote for my current size, C.
I was a natural DD (not overweight, hourglass figure) as a teenager up until child birth. I never liked my breasts…never. I wanted the small and perky Bs other girls had in high school. When I got pregnant, I thought maybe I’d be spared getting bigger because I was already so big. Not to be…when my milk came in (twice), I ballooned up to a 42J!!! I shit you not, I still have the ridiculous nursing bras as a reminder.
After breast feeding my youngest was complete, I made sure I lost all the baby weight and had a breast reduction (believe me, they were wrecked!). Because there was so much mass removed, it was covered by insurance, yay! Post surgery, I was an A and it was weird. They were SO high and perky, I could barely get them into a bra (sitting above the cups kinda). After time, they settled a bit and became nice solid Bs…happy times. Now that I am older and carrying a bit more weight (no, not fat), they are a solid C. I really like this size…it’s still sexy without being over the top. Sure, they are still scars…but they are mild. Anyway, I have embraced the scars because I know what they looked like before…breast reduction was the best thing I could have ever done for myself.