Someone suggested that my wetsuit is too warm..
cold water = shrinkage = less to rub!
What do I wear.. usually 'cotton budgie smugglers' under a wetsuit with seat harness (cos that's what I had - I am looking for a waist harness at the moment). BUT, I get the same thing freeballing in boardies, even if I just go snorkeling or something (mmm.. crayfish!).
Lamisil cream clears it up nicely (athlete's foot / jock itch etc) but what I'd really like to find is a permanent cure. Funny thing is that it only affects the leg, and not the sack itself. It's got to be some kind of fungal thing, so surely it can be killed permanently unless its in every drop of seawater? Perhaps Canesten is gruntier..
Gestie - shower doesn't fix it.. maybe you were thinking of wool rash?

Willy - sounds like you need to wear speedos instead - less drag too, so you should go even faster!
Shark - Yeah, I live in 'the Naki', and sail here every chance I get. The break was nearly twice as big as in those photos earlier on, but I was out there sailing instead of resting on the grass watching!