Right now you are at an age where you are probably producing more of your own natural pheromones than at any other time in your life. This will decrease as you get older, and you will probably want to increase your dosage then.
For now, you are also producing tons of your own -none, too much will scare girls away. TUTH is a tricky beast and should only be worn in an already sexually charged situation, such as with a girl who’s ready to go further. If you wear too much (which you could easily do, even with only one spray due to your own natural phero production), or if you wear it in the wrong environment, such as work, school, church, the store, a friend’s house, a party, etc. you may well be percieved as a pervy horndog who only thinks about sex.
Instant Shine, you can use as much as you want, as far as I know, without negative effects. Start with smaller amounts at the beginning, work your way up until you find the dosage at which you get the best effects. That is called your “sweet spot”. This post might help How To Find Your Sweet Spot (How to find your sweet spot...).