At the start of intercourse you rub the tip of your penis on the women's vagina. Also spitting on it or licking fingers and rubbing on the tip to add moisture.
I was chalking it about to nail her and she stopped me andasked what her name was.
A (male) gay sexual term meaning to place an erect penis around a partner's anus and getting a dab of fecal matteron the tip then knocking one testicle with the fecal dabbed penis into the other testicle as one would with a chalked pool stick in a game of billiards.
Marty: Hey Steve, did you have a good game of billiards last night?
Steve: Yeah, I really had fun chalking the pool stick and knocking Richard's balls around.
The act of being so into a 69, your nose enters her rectum, causing a brown rub on your nose tip...
"Dude, Christine had me so into 69ing with her last night, I didn't realize how much I got into her; I chalked my nose cue..."
"Mark, that is REALLY Chalking the Nose Cue}, it's still there! WASH YOUR FACE!!!"