I’ve always been a big sweater even when healthy, but when I’m sick, I literally sleep on a towel, so I know what you’re talking about.  I, too, did not experience this in my 20’s, but have noticed it more during my 30’s.  On busy days, I often change my shirt 2 to 3 times a day.  Some people say it’s healthy to perspire, so I guess we’re VERY healthy...  Take care, Eric