Confession from a Barista

So here's something I've been really excited about lately, even though it might seem a bit silly. You know how sometimes you just feel like trying something new and different in the bedroom? Well, my partner isn't super into BDSM or any kind of roleplay, but I've been wanting to try some light restraints. Just tying up one hand for a little while during sex, nothing too crazy! It's not that I'm domineering or anything, it's just this idea that being held still could feel... well, really good. But every time we talk about trying something new, he gets nervous and backs off. Am I the only one who feels like they can't share their fantasies with their partner without getting shut down? Should I push for some kind of compromise or try to find a different way to explore this on my own? Any advice from anyone out there who's been in a similar situation would be hugely appreciated.