If you've ever been arrested for having sex with your sister.
http://www.freerepublic.com/focus/f-chat/1388930/posts?page=190#190
..."If you've ever been arrested for having sex with your sister........
So Clem meets Lyle on the dusty street corner in Bugtussle South Carolina, and congratulates Lyle on his marriage of last week.
But Lyle tells him, Clem it didn't work out, so's I got a de-vorce.
"But Lyle, what happened?"
"Well Clem, I found out that she was a virgin, an' dammit Clem, if she ain't good enough for her own family, she certainly ain't good enough for my family!