A son comes home from college

A son comes home from college to West Virginia and tells his dad about a wonderful girl he’s met.“Dad, she’s fantastic. She’s smart, in great shape, and she’s getting her teaching certificate this spring. I’m going to ask her to marry me, but…”
“But what, son?” asks the father.
“She’s a virgin.”
The father scratches his beard and says, “Son, if she ain’t good enough for her own family, she damn sure ain’t good enough for ours.”