Is it ok to ask my girl friend not to wear ''slutty'' clothes nicely and respectfuly of course?

i just dont want to have to get into a fight with some disrepectful dude whos drooling on her. do you think she maby does it so see if i will tell her its not ok to test my sense of self respect? when i ask her she gets kinda fussy but it almost seems like she likes when i tell her.
Is it ok to ask my girl friend not to wear ''slutty'' clothes nicely and respectfuly of course?
Post Opinion