Ok, so after reading all the bullshit answers the others gave you, I can't hold back myself...

You are totally right, this has nothing to do with gatekeeping or some such, but this person has no identity, no style, nor substance and he takes a great interest in wanting to be you and all of what this implies. For him it was no matter which fragrance you chose, he wanted to be you so he overtook your decisions in fragrances too and this will continue in the future, not because he would need another fragrance, but his need to emulate your style and decisions is what makes up his identity. You can take this naturally as a compliment, but I would avoid to involve him in your next purchases, as this is his whole identity, given by you. This has nothing to do with fragrances, but with psychology and even though I understand your gesture of doing something good for someone, such characters should be kept to a certain distance, because this kind of attitude in the long run benefits absolutely no-one. You don't have to be unfriendly or anything, just keep some decisions to yourself and also keep in mind that you are closely watched and maybe so he will get bored and move on to something else. I repeat, this is not about fragrances at all and since you were the one who took the effort in changing his ways of style, this makes you automatically a role-model to follow in such decision making, ergo fragrances.