Chafing, caused by sweaty skin rubbing against more skin or clothing, is a common problem for both men and women sportsters. The skin around the groin, inner thighs, underarms, and nipples gets the most friction and is most prone to irritation. The talcum powder you have tried is one way to keep skin dry for light physical activity. Cornstarch and potato starch are other options. Lube Up Dry or unmoisturized skin rubbing against more of the same for long periods of time can get sore or hurt whether you're working out, or making out.
Lubricants promote a frictionless glide.
Non-petroleum based body lubricants are also available in sports shops. Lube can be used on feet to prevent blisters from forming, too. Instead, choose synthetic fabrics, such as spandex or Lycra, that wick sweat off the skin for a more comfortable feel. For instance, some men wear bike shorts or spandex underwear beneath running gear for an extra layer of protection. Experimenting with a greater variety of outfits, and adding some lube and quenching refreshment to the mix, can help you find a chafe-free combination and relief.