Essentially this has been happening for probably quite some time, I remember seeing it on many occasions before but have simply discarded it as fluff from somewhere. However last night I chose to have a closer inspection – basically when I wear dark coloured underwear I notice that over a day or two I get a build-up of what appears to be dandruff, it settles down the centre of my pants (bum crack – testicle area) – it looks like very fine dandruff or flakes of something, I’m fairly sure it isn’t semen because of the way it collects, and it doesn’t appear to be fluff.

I’m not entirely worried, just curious as to where it might be coming from?