You shouldn't sniff tampons.
Adam is a janitor, and he is cleaning out the women's bathroom.
Adam wants to experience a cheap thrill.
Adam decides to use a toilet while he is in the women's bathroom because he has only ever used a toilet in a men's bathroom before.
Adam notices women's sanitary items in the trash he is taking out and brings a piece of it to his nose because it seems fun.
Adam giggles childishly at the notion the toilets are any different than the men's.
Adam contracts an embarrassing rash from bringing the item near his face and breathing its contents.