The sheepskin rug.

You smile at the thought of having sex on a sheepskin rug would fit right in with the 1970s vibe of the basement. The rug is about six by seven feet, made from six pelts stitched together. You take Ellie and Val's hands and lead them over to the fireplace and get them to lie down on the soft ivory fur. Loretta, Connie, and Amie sit or kneel around the rug to voyeuristically watch their friends about to be fucked by you.

You stand above the two girls, taunting them with your angry erection. You note that of all the girls here these two are both nymphomaniacs -- they love sex. However, they will now also share one additional thing in common -- your cock.

The two girls stares your thick, veiny cock and anxiously hold each others' hands while spreading their slender thighs apart. Then you realize your dilemma: you only have one cock but two pussies. The most obvious solution is to fuck one girl first then the other but the fantasy would be of course to take both girls at the same time. Most men would give up their left nut to have your fortunate predicament.