A couple of things. I have done plenty of chores for my longtime Mistress - driving her on errands, moving her belongings into her storage room and her home, etc. It gives me more time with my Mistress and she appreciates what I do.
About "butt stuff," I'm sure I've told the story I had a couple of lousy experiences when I first got into the scene as a college kid. Not my thing. However my Mistress loves aggressively dry humping me since I first met her, however based on my current flexibility, age, no way I can take her strap on. Yet she began to have me worship her strap on orally. I hardly gag anymore and she's aggressive. Is that "gay"? I don't know & I don't care, I began doing it because I'm in such sub space I want to please my Mistress, and it now turns me on tremendously. If we are truly submissive you have to at least try something that you might be comfortable with because your Mistress loves it. Same thing happened with me and GS... but that's for another thread.