I thought this was funny but not too off-color. If you disagree, toss it and accept my apologies.
A man is at work one day when he notices that his co-worker is wearing an ear ring. He thinks of his co-worker to be a normally conservative fellow, and is curious about his sudden change in "fashion sense."
So, he asks, "I didn't know you were into earrings."
"Don't make such a big deal, it's only an earring," comes the sheepish reply.
His friend falls silent for a few minutes, but then, dying of curiosity, he asked, "So, how long have you been wearing one?"
"Ever since my wife found it in my truck."