Why is he like this?!?

I went on a date with a guy who is 26 last month. I’m 22. I told him I was watching Superman and he’s like “omg Superman is my favorite.” He called me cute so I said he’s a man of steel lmao and he said he’s secretly hard. And I’m like lmfao it’s not a secret if you just told me and then he sends me his hard on through his pants. And I’m laughing omg. So I send a pic back with a cucumber in my pants saying lmao. He’s like: wow you’re huge and I said back I’d like to think I’m above average he said he’s bigger lmaooo. So he’s like “is it weird that I think you have a nice ass and I want to bite it?” I said it’s not weird but I wasn’t expecting that (maybe he’s freaky haha) He said he would like to do that. I want a relationship so should I just be like: so while what you said earlier was nice, but I have to be honest and say I want something more than just hooking up. I don’t sleep with someone I hardly know?