MMM, I'd like to sniff the crotch/ass parts of their respective spats whenever they put 'em in the hamper after using them up for the day!

Here's an odor anticipation chart:

Sasha, crotch: light musty pissy odor, ass: sharp sour fart infused stink.

Mikasa, crotch: sharp sour pissy stink, ass moderate-strong musty stinky odor.

Annie, crotch: light musty sweet odor, ass: light-moderate stinky sweet scent.

Either way, crotch/ass sweat along with the spandex should enhance whatever stinks they've worked up, I'd sniff all three till I'm cumming hard from those musty/sour spandex infused feminine/hygienic odors!