from the neighborhood: graffiti fail?

I finally snapped a picture of this piece of graffiti in our neighborhood that makes me laugh every time I walk passed it.


I'm assuming the punctuation was meant to be an exclamation point emphasizing this (supposed) sexual activity of Lisa's; instead it came out as more of a query, giving the phrase a tentative aura: maybe this girl we know likes anal sex? we aren't sure? Well done y'all!