You downplayed their criticism with "It's a porn game. It's not that serious." to which they understandably defended themselves. If you're open to others criticising and having a discussion, don't act like their criticism is somehow worth less just because it's directed at porn. It comes off as antagonistic.
I didn't downplay that they could criticize. I was downplaying the seriousness of that scene. I was disagreeing and pointing out what was known all along about the game, "Magic big dick scenarios or unrealistic scenes." AKA, porn logic. He gave his opinion, and I gave mine.
When I replied to his criticism, he said, "That's because it was a dumb scene". If I liked the scene, does that mean he downplayed my opinion?
State your opinion, don't cry when it gets challenged.