The farthest anal canal possible to reach in a man before instant orgasm, usually tried to be reached so maximum butt sexed can be enjoyed for before an orgasm.
When you drive out into the middle of the ocean with a girl and have sex with her. When you’re about to cum you pull out and put your thumb in front of your penis to split the stream, and cum in both of the girls eyes. You then dump her overboard and drive away.
“Hey Jimmy, I heard you hooked up with Jessica last night.”
“Yeah man I rented a boat and Deep Blue Sea’d her.”
“Jimmy, you rascal.”