When to people are ass to ass having sex. With two women a dildo is involved. With a man and a woman the mans penis is bent back and penetrating the vagina or anus. The two partners are able to look through their legs at each other while in the position.
I have done this position with my boyfriend several times. It is possible!!
Lets get a little frisky tonight baby, and do it double doggy style.
Did you see those two lesbians doing double doggy style with that big pink dong?