You might think this is a stupid question, but please bear with me. I am asking because, from personal experience, I believe it might. I have pretty oily skin/hair etc. which is quite a nuisance!
Firstly, I had noticed in the past, with my hi-quality headset such as Sennheiser, etc., some of which have a rubbery coating on the ear muffs, that they got damaged pretty quickly compared to those used by my brother or my wife for example, they having "normal" skin.
With watch strap, there's nothing to compare it with really but I did notice on one of my Casio's, a G-Shock that has made it into my rotation and hasn't been flipped for a few years that the strap is starting to look a bit unwell. It doesn't get worn that much, maybe a few weeks, maximum one month total in a one year period.
So, is anybody else experiencing this ? Maybe some chemists here on the forum that might have some fancy explanations ?
P.S. I do try to wash/rinse (with mild soap) the strap after wear, since I noticed this, not sure whether that helps much though.