Why men wear earrings

A man is at work one day when he notices that his co-worker is
wearing an earring. This man knows his co-worker to be a normally
conservative fellow, and is curious about his sudden change in "fashion
sense."

The man walks up to him and says, "I didn't know you were into
earrings."

"Don't make such a big deal, it's only an earring," he replies sheepishly.

His friend falls silent for a few minutes, but then his curiosity prods him
to say, "So, how long have you been wearing one?"

"Ever since my wife found it in my truck."

(I always wondered how this trend got started)