A sexual fetish involving two individuals clench their teeth before proceeding to clash them with each other. More deviant variants involve charging at each other to clash teeth, or a third person tying two people on a rail, facing each other head first with their lips taped back, before ramming them into each other.
Dentist:"And how did you break your tooth?"
Patient: "My mate Mike helped Sally and I do some teething last night."
Dentist:" Dude that's fucked up"
When you tittyfuck a girl's ass. Your penis will move up and down in between the cheeks without entering the anus. Only usable on a girl with a tight ass.
Yo man I was trenching that bitch so hard last night
Trenching: The act of having sex without penetration by simply putting your penis between the woman's legs in her thigh gap and thrusting, or by rubbing the penis between the labia ie. In the trenches.
Dude she was a prude and wouldn't let me bang her, but at least I got of while trenching her.