I once dug around in my girlfriend’s hamper looking for panties and shorts to sniff. Once I found some I smelled the crotch and ass of her sweaty worn gym shorts and then sniffed her panties in the same way.
It made me so hard that I ended up jerking off and shooting a huge load while she wasn’t around. She’s my ex now but I’ll always remember sniffing her dirty gym shorts and panties.