I have to say yes to all. Changing room- Walmart Bathroom- strip club Cupboard/closet over here- supply closet at a nursing home. Stranger- many times
All but the cupboard.
If I were THAT horny - masturbate.
Changing room? Absolutely yes
bathroom? Again, yes
cupboard? I'm assuming you mean pantry? Then yes
with a guy you dont know? Absolutely not