Why do girls make fun of briefs?

like to wear the white hanes and fruit of the loom briefs. Why do girls say that it looks like their underwear and mostly their dads and little brother wear them. Also they said that they look like diapers. Is it okay for me to still wear them when i am a junior in high school? I cant stand boxers.Does it reduce sperm count also? I don't want to get made fun of in the locker room. My ex girlfriend spread rumors that i wear those things. It's very embarring. Shes a sopre and she dumped me. Do you girls accept it if your boyfriend wears those? Is it the style or the color that you don't like?