when a man has sex with a woman on her period. He pulls his dick out and smacks it across her mouth and says "Why so Serious?"

When a man has sex with a girl on her period, he takes his dick out and rubs it on her lips making it look like The Joker from The Dark Knight. When she gets pissed, ask her "why so serious?"

While having sex you finger the girls ass and make sure to get her poo on your finger. When ready, you pull out (before during or after cumming as it does not matter.) and smear her poo from one cheek, across her lips to the other cheek. When she gets mad at you, simply ask "Why So Serious?".

A sexy stealth face blasting move in where you pull your "dork" out and blow your load in a smiley face motion on the girls/boys face and when they are just about to yell at you, you say "WHY SOOOO SERIOUS!?!?!?"

When you are havin sex with a girl while she is on her period and you pull out, wipe her blood on the sides of her lips into a smile and say "let's put a smile on that face."

a sexual act which involves a guy having sex with a girl who is on her period, then pulling out and dickslapping her on both sides of the face, resembling the joker from batman.

A sexual act when a woman has intercourse with a man, while she is at the end of her menstrual cycle, and then the man ejaculates semen and blood on her face turning her into Heath Ledger as The Joker. The man then asks: "Why so serious?!"