Background: we're both feminists. He's a strong personality, very intelligent, very loving, considerate, supports my career, does (more than) half the housework, cooking etc. We're not Christian or conservative.
But...
I am completely submissive to him and he sets the tone in every aspect of our relationship. Obviously there is a strong (and very hot!) BDSM undercurrent to all this. But it goes way beyond the bedroom: he leads, I follow, it's obvious and noticeable, and we both love it.
He's 'in charge'; never controlling. I am always listened to, and feel completely equal. I just do as he says and trust him to do the right thing. We're not ashamed of how we are, it's fundamental to us and because of that we want it to be included in our vows. He says it's up to me but he would like it very much, and I really, really want to say it.
BUT: it would mean outing our 'activities' to all our family and friends. I don't want our wedding to become all about that one line. Maybe no one would really care or give it any thought? We're happy to simply say: 'that's our dynamic and it works for us', to most people, but he has a 20-year-old daughter and it's her we're most worried about. She's sassy and worldly and she'd get it at once and probably be fine with it in private, but might find it really embarrassing and awkward... argh!
Help! It's the whole please ourselves or please others thing, I suppose...