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'Modern Family' Stars Crash A Copulating Couple At Frat After-Party

And they got a picture with them!

You never know what will happen when Jesse Tyler Ferguson and Eric Stonestreet have a night on the (college) town -- especially if they're at a frat party.

Ferguson dropped by "Conan" Wednesday night and told the hilarious story of how he and his "Modern Family" husband visited Stonestreet's alma mater and ended up surprising his old fraternity at 2:30 a.m.

"They had just thrown this huge party where they basically trashed the frat house," he said. "They were apologetic how it looked, but I was like, 'This is exactly how I was expecting it to look like. It's disgusting!"

And if that wasn't enough, Eric wanted to check out his old room, where he unexpectedly stumbled on a copulating couple.

"There was a man in there with his lady friend and they were under the sheets doing naughty, naughty things," he laughed. "We come into the room, and they're like, 'hey!' and she's like covering herself up with a sheet and then they were like 'oh my god can we get a picture with you guys?' "

And, being the most awesome duo in television, they obliged with the naked couple. Awkward!