8 XXX : LipsThatGrip

I really enjoy pulling all the way out of my gf until I can see the outline of my tip in her lips then slowly putting it all the way back in. Can't be the only one, right?
I wonder how strong the social aspect in our brain is. Even though i know the rewards for socializing with girls are amazing (see picture) and my sexual urges pretty intense, it just stands no chance to my social obstructs i created in my head.