Depends on the person really - you can get a wide range of responses on a range from nothing at all to very obvious and this can be anything from straight away to some time after exposure. For a whole lot of reasons - social, environmental and personal.
IO and IH are probably about the most similar smelling, due to to both being made from different proportions of the same nols - If you ever get TUTH or IJ, have a sniff to compare - you will hardly believe its the same scent! 
Just… please… for the love of all things holy, don’t walk up to random girls, hold out your wrist, and say “Hey, smell this!”
Haha don’t worry. I’m not going to be pathetic. I think of Pheromones as cologne. I have girls sitting next to me in class and im sure they can smell it from there. I just have to wait and see. I’ll post results here I guess.
Good man. 
One thing I do not get. Me and my roommate were talking about Pheromones, and he brought up the topic of how girls’ hairs smell so good all the time and how it makes you kinda turned on. So we agreed that it is possible for 90% of girls to use pheromones. Is that true? Some girls say that it is “Hair conditioner” but I know a few guys that use hair conditioner and doesn’t have even a fraction of the scent.
Anyways, I noticed that when a girl walks in front of you, whether or not you are in class, you smell the lovely smell of flowers. The scent on them is obviously very strong. I tried pheromones today in class, and I wasn’t even able to smell it myself unless I sniff my chest. How do girls make the scent so strong? What I did was spray 1 spray on my chest and half a spray on both my wrists. Is it just because my nose got used to the smell?
It’s really strange and I am confused 
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Bump?
msg2short