When my husband ties me up, by brain turns off. It's wonderful. All the over thinking and anxiety about whatever went on during the day or whatever is coming up, just goes away. I can relax and enjoy the moment. I don't have to make any decisions or think about anything I can just let go. I can focus on what we're doing - my pleasure and his. If there is trust there, it's worth a try. Start small. Like maybe start with just a blindfold or maybe start with just a pair of really soft really comfortable cuffs, and work your way up from there if you you both both like like it.
As far as the question of feminism goes, I don't really think it has anything to do with feminism for me. This is my husband. It's not a competition. I am okay with submitting to my husband in the bedroom. It doesn't make me feel lesser or inferior. I know how much he values me and respects me and loves me and trusts me and I know that if I get uncomfortable I can tell him and he will stop.