Why is he so turned on by it?

its a straight guy thing....one of the biggest fantasies...two gals!...wanting to be in the middle...almost all guys get solid thinking or watching two girly girls make out! i dont like type ...fem,sweet and giggly..oh yeah! would love to wipe down two girly girls at play and would love to be in the bed to advise and ist in anyway.xxx.let me bring a cold brew to your sweet lips as your playmate nurses other parts.sweet honeys at play...yes ma'am!