How do you ask your sexual partner 'what do you like to do in bed and how'?

The most important rule about asking sex questions is to never ask questions while actually having sex. The only exception to this rule is when you are actually doing the the experimental moves because the last thing you want to do is not be able to say that the new position hurts and can we try something else real fast. ;)

The best time to talk about preferences is after sex. You could start by saying, "hey do you like it when I do..." or "do you think next time we could try doing..."

If you never ask you never know. And if you ask at the wrong moment you won't ever know.

If your partner is uncomfortable talking about sex when you're alone together then you have a bigger problem then just decided what position to try. Being comfortable while communicating your sexual preferences is extremely important.

Whatever you do, do not freak out if they have a request that seems strange to you, b/c you never know if you might like it, "Don't knock till you've knocked it!"