suaige: while living in the orient we didn't call it jock itch we called it JUNGLE ROT. Rumor was if it got bad enough your balls would fall off. Don't think it was true, but you know it might not have been such a bad alternative at times. After 3 days in tropical monsoon weather I looked like i had an apple between my legs, It took medicates soap that really burned to started to clear it up and vaseline to get rid of the the skin irritation. OH WAS I EVER IN PAIN.

well after coming home it only took 7 YEARS, several types of over the counter stuff, 2 prescriptions and finally cortizone injections to get rid of it.

In the process I used the creams for so long they thinned my skin and I got stretch marks at the age of 25 ( I also grew 1/2" to 6' but think that was unrelated). I also developed a sensitivity to sweat, its not an infection its more like an allergy, I sweat there I itch, can't be cured, won't go away.

As for hygene, well maybe if guys only shower once a week or something, but mostly I think you put that many layers of skin under a couple of layers of clothes anywhere on a hot day and you will really sweat. Anti-persperant is the only long term assistance I have found that really helps.