Idk how I should respond.. please HELP ME

So I sent a guy that I like (he likes me too? LMAO idek) A picrew that I made and I said "oh he's hot " and he was like "he is" and I was like "threesome then?" Jokingly and then he said BEEEET and we kept talking and I was like "I don't actually like threesomes lmao" and he's like "I'm cool with it as long as it's two girls" and I was going to say something about messing around with the girl then he says to me "Cuz if it's 1 girl I don't wanna have sex with them" ... Bish wha? And I was like "you're joking.. right? Lol" and THENNN he says "I'll still do it but I prefer two girls" and I just don't know how to respond to that so he's enjoying the left on scene field so can someone give me some advice or funny reply because I'm still just shocked that he said that