I still vividly remember my very 1st 25km race or rather vividly remember its after math. I think I chafed in every conceivable part of my body. The last few kilometers was unbelievably painful, not only did I chafe in the "groin-al" area, I was also holding my wet singlet away from my incredibly painful nipples.
After that run, I immediately swore off wearing untested race singlets as well as ran, well hobbled over to the nearest Mercury Drug to buy not 1, but 2 tubs of petroleum jelly. It was the only non-pleasure lubricant I could think off at the time. No way, I wanted to chafe like that ever again!
Nowadays though I use this...
So much easier to apply and lasts forever! I should know, not a single chafe during last weekends long, wet run!
Best of all, thanks to my good pal Hector at Second Wind Running Store, I don't have to go to Amazon.com to get it. Its now available, albeit in limited stocks, at the shop for P480!