Dinner Table Conversations

We were sitting around the table tonight eating left over spaghetti. S (a very close friend's daughter) was talking about giving blood for the first time today. T was eating a hunk of cheese. Somehow the conversation got around to people being caught having sex in the bathrooms. S was saying how unsanitary it was and L...he says why? There's soap! OMG!! Way funny. Then the conversation turned to cows. Don't even ask me how - they are teenage boys! Anyway, out of the blue T says that cows do not have "outer anal sphincters". Huh?? He then continues and says "They can't control when they poop!". Yep, this is dinner conversation - sex and poop!