I spread my dick on some crackers...

Last night I walked the strip with a (just friends) female friend of mine. We were walking along and this guy says to her: "Hey baby, why don't you ditch the cheese dick and come back here and fuck me." I just flipped him the bird. We aren't romantically involved so I didn't know what actions were within my rights. My mom suggested that I should have confronted him. Not on the basis that I was defending "my girl" but that he was being disrespectful to my friend and I. I love my mom. She teaches me things.