I think the same holds true whether you're a male or female sub- take it slow & try not to pressure him/her.

As for myself, I just told my wife straight out of my interests & made sure I said she didn't have to participate.

It all started gradually, & was introduced into our sex life- I won't tell you how long it took or you'll be discouraged!

We all need to bear in mind though, that not everyone is into such pursuits & be prepared to accept that, or find someone else.