Let’s pretend that speaking openly about sex and sexuality is not, for most of the people and time, a taboo.
If you had a friend or an acquaintance ask you to suggest some kink they could explore a bit, as safely as possible, to just breathe some fresh air into their sex life, what would it be?
I would suggest they go to a play party, or just read more.
Loads of things inspire lust! Find that kernel, explore it in fantasy and use that openness/non-taboo to express what it is and/or how you’d like to explore it.
Anything can be a fun kink: silk ties, mirrors, feeding/getting fed, anonymous sex, fucking on the bonnet/hood of a vintage car on a countryside drive just before rain in early autumn, vanilla-as-kink, etc.
That’s the lovely thing about kinks, it’s just about being curious and open to explore what fancy comes to you. Some are keepers, some are best as fantasies, some aren’t logistically feasible, some aren’t timed right and some you just get bored of after a while.