The Host and the Not Winner

One of us speaks in riddles and the other speaks in rhymes. If you win this fun, fun game, if you don't, you're really lame. What belongs to you, but other people use it more than you do? Uh, lots of stuff. It's the letter M which mom has to. My little problem is that this thing only reads in the third person boo hoo. That doesn't make me very erect. Let me finish my rhymes, you prick. Well done. I'm a small man, baby asshole. Who am I? It's Mark. But I don't know if I can keep this up. Maybe there needs to be some sort