[M203M4]

I remember reading once that humans are becoming less hairy, and in about 5,000 years we'll be born bald for life.

I don't see what the selective pressure for that would arise from. With grooming, any social bias against excessive hair can now be circumvented, so I doubt the very recent associated reduction in genetic fitness will extend into future generations.

[Lunatic Fringe]

It has to do with disease and sex.

http://www.abc.net.au/science/news/stories/s876284.htm