Graham - if you're going to cycle without shorts, you might be better with boxer type kecks rather than jockeys. If the rash is round the leg creases, it may be caused by chafing from sweaty leg seams, particularly if you then wear them for the rest of the day.
You'll sweat just as much in boxers, of course, but not on a moving part so to speak.
You'll sweat just as much in boxers, of course, but not on a moving part so to speak.