Philadelphia Fist bump

1) Sexual position wherein both male and female are laying back facing each other, either in a scissor position or the females legs bent over the males. The penis must be semi-flaccid to bend properly when inserted into the vagina. The thrusting comes from a rapid succession of punches that contact the base of the penis and may even incorporate grazing of the vulva.

2) how you'd picture two paraplegics going at it

3) see Philadelphia pancake Hawaiian Handshake

"Daisy and I were wrecked after round three but we still nutted using the old Philadelphia fist bump technique my daddy taught me after he lost his legs in 'Nam."