Purity to the absurd
 

A fellow in a bar notices a woman, always alone, come in on a fairly regular basis. After a few weeks of exchanged smiles, he made his move.

"No thank you." she said politely. "This may sound rather odd in this day and age, but I'm keeping myself pure until I meet the man I love."

"That must be rather difficult." the man replied.

"Oh, I don't mind too much," she said. "But, I admit it has my husband pretty upset."

Poor husband. Funny joke though