What you said makes perfect sense, gunmetal.
What I meant by seeing human interactions differently is . . . that sex is an extreme of human interaction, just like violence. It leaves a psychological mark that one will carry with them for the rest of their life, and that change in our psychological
make-up changes how we deal with people. If I see a beautiful woman now, in my mind, I now think : "I'd like to have sex with her.", even though I will probably not say it. It just adds another layer of complexity to situations.
To give you an example, I had a good looking spanish teacher (Senorita Hayes). We had a test where she showed us a picture and we had to make up a story and tell it in spanish, on the spot. Mine was a man and a woman sitting with an older man and woman. I named the younger man and woman the first two names that popped into my head, Francisco and Mia (her first name). Then, I made them boyfriend and girlfriend. Then I suggested that the older two were Mia's parents and the younger two were discussing going on a trip together. I realize now, but did not realize then, that I was flirting with her. I was just not aware of her, or women in general, in that way, yet, then. If I had been, I probably would have been scared witless and failed the test. For better or worse, after sex, I became . . . more aware of people, of what drives them, of what one of their weaknesses is, of something that distinguishes them from one another. Different people desire sex differently, with more or less intensity. Some people aren't comfortable with sex their sexuality, even after sex, etc.
A nihilist would rather light an 11 megaton candle than curse the darkness but . . . a nihilist would rather get drunk and eat cake and have sex than light an 11 megaton candle.