Of course the author does not consider the extra cost of cleaning the bathroom after a man performs his "operation" standing with the seat up.
I also had brothers and my job was to clean the bathrooms each week. My men now sit after I told them that if they stood up, then they cleaned the bathroom! They didn't want to do it either!!
also, I agree with the pets drinking out of the toilet. Not only do my men sit, they close the lid after every operation to keep the cat from going for a swim (she loves water and would be in the toilet in a second if the lid was left up and then she splashes all over the seat! - when we have guests, my son tapes a note to the inside of the lid reminding people to please put down the lid!)
at the very least, my son will not have to go through the toilet seat argument, he'll save his bullets for the toilet paper over/under argument!