I'm 44. People who don't know how old I am usually take me for 30 or early 30's.
Two humourous anecdotes relating to my not looking my age, both at my previous employer.
1. Once I took a special two-day training course with a bunch of co-workers. One game/exercise we did began with the trainer stating "You are the pilot of a 747." She went on to tell us about where it was flying and who else was in the cockpit and how many were in the crew and how many passengers there were and what colour the carpets were (and so on, and so on)... ending with a question "How old is the pilot?". She went around the room and everyone gave their answer verbally. When she got to me, I said "40" as I was 40 years old at the time. She looked at me askance and said "Okay, you're *way* off... how did you get 40 as your answer?". I told her that I would explain it, but only after everyone else had given their response. So once she had finished going around the room, she got back to me and said she wanted to know how I came up with "40" as my answer. "Because I'm 40 years old," I replied.
2. Once, chatting with a co-worker friend , I made a passing reference to how I didn't want children and was never going to have any. Another co-worker, a middle-aged woman who I didn't know, overheard my comment, came over, and politely interrupted us. She said that she didn't want to be rude, but she found my attitude about not wanting children to be very offensive, and said that I would change my view once I was getting close to turning 40. At which point my friend burst out laughing. The woman indignantly asked what was so funny; my friend replied "He's 41 already!". The woman visibly blushed, mumbled something, and backed off...
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"Some mornings it's just not worth chewing through the leather straps." -- Emo Philips