I think this would piss some people off, but I've always had a kink for Parental roleplay. In the old days, since queers couldn't actually marry each other, one loophole would be to adopt one another. I've always found the idea of a lover adopting me and keeping up appearances of having a straight parental relationship in public.  Even better, I like the idea of being in some exotic country where parents have heavier rights over there children. He would then proceed to exploits this as much as possible, to my delight.