He stopped in mid-thought and gave me a "don't be ridiculous, of course my shirt's not inside-out" sort of look, then glanced down. His yellow polo shirt was indeed facing the wrong way -- outside-in, if you prefer. "Well, no."
I blushed, and we all had a good laugh. "That's okay," I said sympathetically. "Bad things happen to me sometimes when I get dressed before I've had any coffee."
"The problem is that my wife left before me this morning, so she wasn't there to make sure I looked presentable."
"Actually I haven't had enough coffee myself, or I would have been more discrete rather than announcing it in front of everybody. Sorry." We were all laughing, but good-naturedly. Somebody pointed out that I must be more observant than the rest of the team, because they'd been talking to him for quite some time without noticing.
While T went to the bathroom to correct his shirt, I told the rest of the team, "The extra-odd part of this story is that this is not the first time this has happened to me."
Several months ago, at a previous job, I went out to lunch with a few coworkers. We were sitting around a booth having gyros, when I noticed that the guy across from me, J, was wearing his shirt inside-out. I told him, and we all had a good laugh at the silliness of the situation. He had meant to fix it in the bathroom on the way out, but must have forgotten.
Later that afternoon, he came to talk to the person who sat across from me. I noted that he had forgotten to correct the situation. This time I was fully caffeinated and capable of being more polite. Being that we were in the office, and the guy he was talking to hadn't noticed anything, I discretely wrote on a post-it note: "Your shirt is still inside-out", and handed it to him.
Upon reading the note, the portly software engineer gave an exasperated sigh, and a little laugh. He pulled his shirt off right there in front of us, turned it right-side-out, and put it back on. "There, all better."
I turned beet red and started laughing so hard I couldn't breathe. The guy he'd been speaking to, who hadn't even noticed the shirt, was completely shocked! People came from other areas of the office to see what all the commotion was, since all of us were laughing so loudly. J, who was also bright red but quite proud of himself, happily told the story again and again. It was hilarious, and levitated the whole office mood the rest of the afternoon.