We weren't sure (and still aren't) about the quality of our tent. Therefore we used the water hose to test it. It did pass the water test, but the day afterwards one of the tent pegs broke...
When we tell our friends that we are leaving for France on bicycles, one of the first question is: Ouch! Dont you think your ass will hurt tremendous?
We also had some concerns about this issue and therefore we were happy to see that bicycling pants have built-in pampers :)