Why do I get made fun of for wearing white briefs in the locker room?

Anonymous
So I’m a freshman in high school and started changing in PE but I’m the only one who wears briefs. The rest wear boxers and say that my mom still buys my underwear. And call them tighty whities. I don’t want to switch.
Why do I get made fun of for wearing white briefs in the locker room?
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