They suggest that the reports of debauchery were exaggerated. They admit that there were barely clad pretty women dancing at the party. But they don't understand the blow-back to Marc over the activities of his guests, who are consenting adults.
As one friend noted, "Marc was not in the pool."
Another friend sympathized with his plight. He said, "His wife cheats on him with the 23 year old tennis pro, so he lets off a little steam. Yet, he is the one that is vilified."
"Letting off steam" didn't work as an excuse for Abu Ghraib, afraid it doesn't really work in this instance either.