I'm the sub in a dom/sub daddy/son relationship with an older guy (10 years difference). first guy I've ever been with. pretty new to this. I'm very submissive BTW. well his birthday is coming up, and I'm having feelings for him. I wanted to do something to show complete submission. there's 2 things we haven't done together. which one says "I belong to you" the most: swallowing his semen? or allowing him to cum inside me? I'll be over at his place tomorrow night. please help!