You don't. Yoga pants feel better without underwear. And if your feeling really kinky, outline your vagina lips with them. Guys love that.
You shouldn't wear any underwear with leggings. It looks ugly!
nothing wear your underwear
leggings long underwear locket
Normal underwear.
deerskin leggings
super man kind!
thong
Boxers.
briefs
breifs
none
He wears boxers