Best Rhyme - sex

This man and woman was in a little shack getting it on when the
door blows open on them, cool air rushes through the doorway,
the man looks at her and says go shut the door, she responds
with hell no i'm cold, so the guy says well lets do it this
way, whichever one comes up with the best rhyme the other can
get up to shut the door is that agreed? she agrees, he lets her
go first so she says...
3 and 3 is 6 and 3 is nine i can tell the length of yours but
you can't tell the depth of mine, he says thats good, now my turn
here goes..
3 and 3 is 6 and 3 is nine i can piss in yours but you can't
piss in mine!