Hi Brian and welcome to the forum! Wow, I’m grateful for such an exhaustive and detailed intro post. Many times, getting new ones to open up, it’s like pulling teeth! 
Ok, let me take a crack at your 4 points:
1. Half my friends don’t really engage in conversations with me, I’m not sure if I’m intimidating or what’s going on. But they often don’t engage until I start talking with them. The 'Instant Openness" pheromone might help here.
Ok, now since you qualify them as your friends, then, once conversation flows, what kind of convo’s do you have? IH may be good, though in the case of family and friends, I’d suggest IO. IH will give off the comfortable to talk to you vibe as well as incline convo’s to go to a more intimate level. Though you should already be there with family and friends so you just want to get the convo’s started so IO would be good. IH I usually reserve for acquaintances or people that I’m about to meet.
2. JUST FOR FUN.. Would it be a bad thing to wear one of the sexual pheromones in my seminars just to play with the girls (mentally). Not sure what this would achieve in the short run seeing as how I can engage in relationships while I’m teaching them… but once the semester’s over, it’s fair game lol. Would it be bad to plant a seed ahead of time?
Bit of an ethical edge to the second point. Though, I would ask, then, what of the use of colognes and sharp clothing. This could also mentally ‘mess’ with them as well, since they’d know you’re ‘off limits’, while still giving off an attractive vibe. Mones, I see, are similar as they will not override a persons free will.
3. Would the ‘A314’ or ‘Instant Shine’ do anything for me? For the people that know me, I already give off the vibe.
Well, it could solidify that same vibe. It will fortify that leadership position in the case of A314 and will give you a boost in self effects as well. The Instant Shine will sharpen that same relaxed and at ease vibe that you put out.
4. Chances of pheromones having an effect on it’s user? If I use a sex one or instant openness, would I be subjected to those effects as well? Or is it mainly affecting people around me?
Self effects aren’t going to be the same for everyone. Also the case with how they affect those around you. Though, when I’ve used AMMO, and to a greater degree TUTH and IJ, I’ve become hornier…
I mentioned the jolt of command feeling with the A314, I still get a centered feeling with it on. Like IO and IH, yes, the effects of these can also influence you. I apply these to the back of my neck or my hands and arms to minimize these effects by keeping them away from my nose.
Whew… Ok… I hope that helps out and will ask that you let me know what you decided on testing and what were the results!!! 