U wan rough, medium or the mild one. 

To side track from this thread a little.

To spice up a relationship, you dont need kinky sex.
you can try be creative in other aspects of your relationship.
Do something else romantic, not necessary sexual.

A relationship that spends too much effort experimenting the
sexual aspect can be quite 'shaky'.

But for at least, you wouldn't want to steer your relationship towards 'savouring the flesh'.

I would personally feel that if you want to know more,
just find out by searching the internet. You probably would find more detailed information than asking in this forum.
The mature adults can advice you but we have other readers
of many age group..