It's probably more repression than oppression, I should clarify. I think for a lot of guys, closeted and/or married, its the anonymity of the hook up. No names, no talking, no smiling. Going to a private place would strip it of that to some extent. Also back in the day there was the threat of violence should you admit publicly that you were gay, and there was no grindr no tindr. Things have changed obviously but that doesn't mean that it still doesn't happen.