Do the Slide

This position will earn you kudos with your lady simply for being able to carry it off.

You kneel down and lift her legs up to your shoulders, then angle your cock down until it slides into her. Standard penetration in this position is difficult given your angled cock; this one's a grinder.

The rush of blood to her head will give the sex a spacey feel, but be careful to ensure that you don't carry on for too long. She'll get a headache.

Needless to say, a long penis is a prerequisite. Rats!