For me it’s foot fetish stuff. Every damned thing else is on the table but before I could make the lethal mistake of talking about it, she expressed her giga-ick about the issue. To this day I thank God I saw the metaphorical fly hit that electric fence before I walked into it.
When I’m in a relationship, usually I can figure out if they would, would consider, or would be against stuff that I may like/want and that determines whether or not I bring it up.
If it’s not a critical desire than I don’t mind just going without. There’s nothing I would really consider “out there” that I find a critical need for with that stuff anyway. It’s usually just a bonus if they also enjoy the same things I do.