How does that work, physiologically? We’re talking dopamine in the brain. If what that user said was true and “overstimulation like that drains your dopamine reserves (or something),” then another person being there wouldn’t make a difference.

I mean, it’s because they have a misunderstanding on how brain chemistry works, obviously. Like, it can store it, but it doesn’t get used up from doing things that feel good. That’s what makes dopamine. And while loneliness is a problem in the general population, it’s more likely that longer lasting gratification from sex isn’t from the physical act or even just the physical act with another person, but the joy gained from the relationship as a whole. Pretending that there’s chemically something different happening in the brain just because there is physically another person there is ridiculous. I’ve had plenty of unfulfilling sex with people I didn’t like that didn’t make me happy/content afterwards like masturbating would have.