I think when both guys are str8 they really get into it. They know it's no strings sex, and they can let down their guard. Nothing hotter than watching two straighties getting hot for each other!
he really likes to suck cock! He can be married to a woman, as he is, and fucked many pussies, he could that was gay-for-pay, but he likes it. A lot. And when he start sucking he gets a hard cock cock!