From an unknown resource:

Question: I have a problem. My ex-girlfriend wants to get an intimate tattoo in the form of my portrait around her vagina. It turns out that when she’ll fuck someone, they’ll fuck me in the mouth. I am uncomfortable, what should I do?

Answer: Make a tattoo around your mouth in the form of her vagina. When you get fucked in your mouth, you get fucked in your vagina. Let her be uncomfortable too.