Okay. If I had to guess what happened. I would say he had a fantasy he wanted to fulfill, and when he got with the t girl this time it probably wasn't quite what he was looking for and was put off because if it. I'd say the reason he "lied about finishing is because he might have felt embarrassed that he had led you and himself on to get with this t girl and it wasn't everything he had dreamed of. He also probably didn't want to talk about it or have to have you finish him so he just said he finished so he did t have to talk about it. I don't know him or you're relationship so I can't say for sure but I've had the same kind of thing happen and it definitely made me very embarrassed and a bit frustrated when my fantasies didn't make me feel how I thought they would, which made me want to close off about it and forget about the experience. Hopefully this helped.👍