I'm actually the oldest at my work out of a workforce of 35 people.....it's not that they are surprised I can text, or use the computer, or work the phones......they are amazed I've still got a pulse.... 
I'm actually a bit chuffed that they often say they can't believe I'm as old as I am.....in a nice way. 
I hear ya, about them being surprised at how old you are, Been there. At least my Wife, StepKids and Friends tell me that I don't Act as old as I am. And THAT is a good thing, right? Now, I DO have one thing going for me, I may be 67yrs old, but my Wife I married 2 yrs ago this coming June 14th, is (Are You Ready For This?) alot Younger than I am. She is actually 36yrs old. Now, I DO get chapped when I am asked if my Step Daughter is my "Grandchild"?

But, I just tell them that she is my Step Daughter and you should see their expressions!
I hope to he'll you can still out drink the little wankers....
..if you do tell em they have a drinking problem....
..they don't know how..
LOL! Good One There, Frank!
