I had a friend who, as part of his psychosis, could perform the mechanics of copulation seemingly forever. He didn’t derive any pleasure from it but he had women lining up around the block to see him. I have incorporated this into my main character’s bio.
Brandt Zigthaler can achieve and maintain an erection and perform the mechanics of sex for hours. His body is in the moment but his mind and psyche are on another plain. Thankfully, he’s married to someone who recognizes when his mind has wandered and knows the triggers that will bring him back into the moment so he can concentrate and achieve an orgasm.
Of course this allows Maya to regulate Brandt. She dictates how long the sex will last depending upon her needs.
Pretty sneaky, huh?