Hello and welcome to the forum Pete! How’d you find it? I wouldn’t use A314 for sex… it’s more for business, alpha male vibe and the like. You are right however with Turn Up The Heat, I’d try 1 spray at first as you are a bit young for it and see how that goes for a while then perhaps try 2.
Too much = less than desireable reactions.
I’d spray the pheromone first, give it a few minutes to dry, then cover it up… or just not cover it up at all. See : Can I use a cover Scent? (An Introduction to Mones: Names, Size, Strength, Use, Effects & Duration - #12 by SteveO) for more information.
As far as where to spray, I’d probably use my chest or neck if sexual intercourse is the desired result. This is a good post on application points: Where should I apply my Pheromones: Application Points? (An Introduction to Mones: Names, Size, Strength, Use, Effects & Duration - #10 by SteveO)