When I was in my early 20s, I had a fuckbuddy relationship with a young hoodlum type guy who considered himself straight. We always had to go through the pretense of me buying him beer or porn or giving him a ride somewhere, so I knew he wouldn't just give it away
This was in the early 80s in the rural South, so we always fucked bare. He insisted that neither of us cum inside the other though. In his mind, cumming inside another man was an extreme gesture of disrespect. Apparently you weren't really being treated as less than a man until you were bred. It took me several months to convince him that I wouldn't be upset by taking his load. Once he started cumming inside, he was more than happy to keep doing it.