I remember a scene like that in "Where the Boys Aren't 15" with
Briana Banks. She walks into an auto-shop bathroom and you see 2 dudes standing standing at urinals in greasy coveralls/hats. (At least, you assume they're dudes.) But then they turn around and reveal they're actually smokin hot babes, and they quickly and violently rip off all Briana's clothes and start pawing at her with dirty hands (her comeuppance for being a snobby bitch). Briana is "offended" but she soon gets into it.
worth a peek if you like girl/girl