STOP! A trend started last year where people were using toothpaste as lube on their genitals. Someone posted a story about it on Reddit probably hoping someone would actually do this, and it was not just one person but many who decided it would be a good idea to put a chemical agent that has abrasives and other harmful chemicals on their penis.
We are finding more and more posts on people using toothpaste as a lubricant and decided in good faith not to link to them from our site. We strongly go with the Dr's on this one and strongly discourage anyone from using the thing to brighten your teeth on your willy or Wonka thinking you're going to have a good time. NOPE! You will have possible scaring on your genitals if you use toothpaste down there.
In one of the Reddit posts, a man states he put toothpaste on his penis and it was not pretty after that. He ended up with discoloration and a chemical burn on his wanker that caused him great discomfort. The man claimed he used it on accident and had to take painkillers to help alleviate the pain.
When you want to masturbate safely or have sex with some assistance as lubricant safely buy your lube from actual sex lube companies or visit your local pharmacy.