One time I was in the women’s dorm and I used the bathroom on the ground floor, it was a unisex single toilet with a door that locked. The funniest graffiti I ever saw was written in pen, “Don’t hate me because I’m beautiful, hate me because I did your dad.” Written underneath in Sharpie was, “Go home, Mom, you’re drunk.”
As a woman, I can tell you that, yes, there is graffiti in women’s restrooms.
The funniest I saw was written on the inside door of a toilet stall 40 years ago. It read: “Don’t bother standing. Our crabs jump 12 feet.”