For this position the man sits or kneels down so that the woman is able to have as much unobstructed access to him as possible. She then lies in front of him and places one leg on his corresponding shoulder, so that it rests next to his face like someone speaking on the telephone with no hands. Lovemaking then commences and the man positions the woman accordingly and occasionally they decide that she should switch shoulders which will take quite a bit of coordination. Depending on your commitment there are various options for how much effort is required on either behalf.
The No-Hands Telephone