maybe because you're peeing like a girl would , not like a guy persay? i mean, both are standing to pee, but with a stp its more 'official' like its supposed to be a penis, but just standing over it like a chick is something a woman would do, one with little class at that. No offense by what i say, but that might make sense. Also, i know i could just never do that because somehow i can use the stp to go the bathroom but if i ever did what you do my dysphoria would go through the roof. since the stp is kind of like a coverup for missing my male-parts down there, but peeing with no stp actually intensifys my focus on the females parts down there and would freak me out