Inter-disciplinary

Don't worry, I'm sure she'll get the hang of it.

I once had a date with a girl who claimed never even to have heard of SPH, but she was really good at it.  I guess some people are naturals.

"Let the butt plug take the strain" was actually one of my few successes when I worked as an advertising copywriter.

On your toes and bent over - at the same time.  Welcome to the modern marriage.

Radical.

Compelling ideas

Can't hurt to try.

Raises the question: can you be 'just good friends' and have a relationship based on slavery and humiliation?

I now have eleven approved begging positions.  Few of them seem to work, I have to admit.

'At a stretch'... oh ha bloody ha.

This one?  This one?  I do have a name, you know. Or I certainly used to, anyway.