I have contended for years that the age has nothing to do with clothing choices - it is the person wearing them. There are many men out there in their 50's and 60's that look good in a speedo and guys in their 20's that shouldn't be seen in a speedo ever. (rule of thumb: If you look down and can't see your swimsuit under your gut -- you should be A. wearing another suit B. heading to the gym (and not via McDonalds)
Point in case:
http://www.tmz.com/videos/0_9ojjah6k/