It is kind of an interesting albeit initially kind of gross to think about idea. When you _really_ think about that person you like probably has a non-perfume smell you like for some reason you can't explain.

Though, I think this would be better executed by going to a night club or something with them...the spirit is there though. Maybe it's just the act of deliberately wearing a shirt without deodorant for 3 days, and then smelling other peoples shirts, that seems repulsive to me. It's effectively the same thing as having a sweaty person pushed up against you at a night club but because this is so deliberate it seems off-putting.