Here's a very advanced (oral) Kama Sutra position that will take balance and dexterity. It begins with the man performing a headstand against a wall, holding his weight by his arms. He can then carefully lower himself down to where he's supporting part of his weight with his head and neck muscles.
The woman slides in, placing his head between her legs and then places her own head between his. The two
This article appears in Aug 19-25, 2010.