I was reading my copy of Mountain Bike, which comes as part of my Bicycling subscription, and saw the following in a section called "Philosophical Q&A":

Don't you get tired of smashing your nuts when you fall?

Assuming your question has nothing to do with how much I like peanut butter (which I don't), I'd say absolutely not. Pulverizing one's testicles is always memorable, even if you've done it a thousand times.

Thankfully I can say that I've never fallen in such a way that I've smashed my nuts in one instant... though I've had some issues with m bike seat before. While I can say the whole thing was memorable, it's definitely not something I'd want to repeat a thousand times, especially if I wanted to have kids.

I actually worked with a guy who had an "accident" mountain biking. Going downhill on a trail, the handlebars turned 90 degrees, so that one of them went straight into his groin as he went forward. Let's just say he was hobbling around the office for a couple weeks after that. That's not something I would wish upon my worst enemy.