In my case, it was my wife wanting me to interact with the guy who we had invited to fuck her. I didn’t get turned on by it in the slightest. But I did get turned on by the reaction she had. She loved to watch me being sucked, or sucking.
I’ve never had anal sex, with another, either female or male, that doesn’t appeal at all. have no desire for anyone to insert their cock in me either. However I never minded touching or sucking, when we were entertaining. A proper blow job was never going to happen as she always wanted the cum in her hot sticky cunt