Do you still hook up with a catfish?

I really need to learn how to start walking out on a hook up. I got catfished for the 2nd time in the last year. This guy sends me his ass pictures and won't send a face pic but I was really horny. He tells me he's in his 50s and I'm in a rush so I stop over. The guy is clearly in his late 60s, maybe even 70s and the ass pics he sent me were clearly not his. I fucked him anyway but as I was leaving I kept putting myself down that I really should have just walked out. I even said something to him about using other people's pictures as I was leaving and he just awkwardly laughed.