Petting the Starfish
When a girl is having sex with someone and they reach around and pet her asshole without penetrating it.
I got thrown out of the titty bar for petting the starfish of my favorite stripper.
pet the starfish
anal intercourse, touching of the anus with tongue,penis, fingers etc.
I positioned myself on my stomach with legs spread and asked Bob if he'd like to "pet the starfish".