It really depends. If it were something I was REALLY not into, I wouldn't do it just for them. I wouldn't try something that would make me upsettingly uncomfortable.
But if it was something I didn't really feel one way or the other about - I'd probably give it a shot. Or something I'd been thinking about, but wasn't sure of - I think we could probably compromise and ease into things.
But not something that would truly upset me in a profound way, not something that would make me feel degraded or a bad kind of dirty.