Not speaking from experience, but AIUI dandruff shampoos work by being mildly damaging to skin, so that any loose skin that might flake off during the day, instead comes off during the shampooing. Considering that the skin in question, when talking about masturbation, tends to be some of the most sensitive, and with a particularly thin layer of dead skin above the live skin layer, plus an abundance of sensory nerves in the live skin layer, what is a painless astringent on the scalp, can for some people be a far more… noticeable affair on other skin surfaces.
ETA: This is meant as an answer to the question asked about why dandruff shampoo might not be everyone’s favorite personal lube.
Okay, this reminds me of a story. I know a guy who likes to tell it. I hesitate to tell it, but I don’t think it’s worse than the rest of this thread. I swear to you it wasn’t me. It really, really was not. You know it wasn’t me, because I don’t do anal sex.
But this one guy I know does, and he has a great story about taking a girl here home with him overnight, and among other things they did anal. Then they fell asleep. He awoke in the morning to find her not in his bed, but he heard these odd noises coming from his bathroom. So he goes into the bathroom to find the girl grunting and moaning while furiously trying to clean her butthole. It turns out that his semen hardened into some sort of cementlike substance overnight, and now she could not take a dump. She was desperately trying to get it to break through up there.
Actually it was the toothbrush thing that caught my eye. All the OP needs to do next time this happens is let everyone know he’s used someone’s toothbrush to clean up. Doesn’t matter whose. Problem solved!
Regular shampoo (or soap) has agents in it that can be quite irritating to the head and other sensitive penile areas, even to the point of feeling like a low-level burning sensation. Dandruff shampoo has much stronger active ingredients in it, making it all that much worse. I only had to make the shampoo mistake once in my young life, and judging by what dandruff shampoo makes my head feel like, I’m glad I never used it to make an “experimental” mistake.
Woo hoo! I’m masturbating in the shower to Filthy Cheerleaders Who Crave Huge Black Cocks on my new Casio waterproof DVD player but not with dandruff shampoo like a motherfuck!
Perhaps one of the hookers that lives there, it sounds as though you would live with hookers, has simply regurgitated a night’s work while showering after his/her “shift”.
