Take a look at your gym bag. No, really take a look at it. Yes, that’s black mold growing where you’ve been stuffing your dirty shorts for the last 3 years. Take a good whiff. The hairs will probably melt off of your nostrils, and your eyes will start watering.
How long have you had that bag? 5 years? 10? You can’t remember, although you think your last ex-girlfriend bought it for you, because you used to just carry your gym clothes in a plastic bag, and she couldn’t stand it. Or was it your ex before her? Or the one before her?