As Zoe and Athena walked away, one of the runners said to the other, "Did you see those to girls? The one on the left was totally checking us out."
"Really, Mark?" said the second. "I guess I wasn't paying attention."
"Come on, Bob," said Mark. "They were totally hot. I know you have a boyfriend, but your bi. I'm bisexual too and I got a total hard on for the blonde. You should at least have noticed a little."
"I guess that I just want to stay faithful to Ron," said Bob. "I know that we have an open relationship and he's really understanding when you and I have sex, but with having a male parther, it just feels a little wrong to be checking out girls."
The two of them stopped behind a set of bleachers to rest. Mark wrapped his arms around Bob's shoulders, kissed him and said, "So, your fine with sleeping around with other guys, but doing it with a girl is 'cheating?'"
Bob snuggled up to Mark, their now erect cocks parrying against each other. Bob kissed Mark on the lips and replied, "I know its stupid. Ron's said he's just as fine with me sleeping with girls as he is with me sleeping with you, but it just feels different."
Mark cupped Bob's cock in his hand, gently massaging it. "Really?" he said. "Would you care for a little 'experment' to test that theory?"
