The girls are horny. So they called in some guys to participate in their game called "Time Athlon". The point of the game is whomever's dick gets hard first, will get to fuck one of the ladies.
The girls got crazy and decided to try on this sex furniture called Ultimate Sex Swing Stand. Retails about 179.00 at Amazon. Works great because you don't have to put alot of effort into sex. The machine helps with the bouncing of things so you don't loose your stamina and energy.