1) head to head; in a
competitive sense, generally reserved for
male participants.
2) cockhead to cockhead; in a sexual, possibly competitive sense, reserved for males and shemales, but could be anyone with
access to a cock or dildo.
1) "Hey man, I'm a little nervous, I've gotta
go cock to cock with Dave later at the foosball tournament, wish me luck.."
2) "Hey man, get your cock over here and we'll
go cock to cock like we were
talking about earlier.