"A kid riding a bike from Alaska to Argentina or a kid looking like this?"

I think the worst part would be looking like that and then getting singled out for ridicule online.

Can anyone tell me whether it is possible to have these erectile dysfunction/fertility problems without knowing it. It is one thing to get a numb feeling persists with it, and cause damage, another to feel great all the time, and then get damaged. I have only had severe pain once, and it resulted from a poor saddle position, obviously temporary. Was a bad deal though, because it was one of the few times I have ever been driven a long distance from home and tools, and dropped off for a ride home. Served me right.

But anyway, I would have thought your kids would not be easily damaged without noticing anything along the way.

Also, most people aren't riding properly fit or equipped. I would imagine fertility might even go up if a person is riding without underwear, in proper cycling attire.

If there is a problem with doing stuff like what you are doing, that I have noticed in a lot of cruising families, it is for the kids to find a second act that compares with the trip. As one kid put it, he didn't find hanging out with his college friends to be an equivalent experience to traveling the Americas in a trimaran, and he was incapable of settling into a "normal" life. But a lot of childhoods are like that just different specifics.