How to ask a guy

Help! I hooked up with a older guy (26) I'm 21 the other night. It was probably the best sex I've had... it was super fun and I definitely want to hook up again with him. He added me on Facebook and just waved at me 😐 I want to ask him to fuck me again😂😂 I want to send a good flirty message though. send me what you think I should write!