i don't water shampoo, but i do with hand soap, as its usually very thick, and you can often almost double it ... but hes clearly not realised you have to stop somewhere.
not sure why he'd think you ad to top it up every single time...
and also he is just doing what hes been told - he didnt cook the idea up himself
but i guess its better than being careless and wasteful like most young people.
many have no concept that these things don't magically appear around the house and think there is never ending supply...
re the idiot - id say your hubby, with his refusal to accept the the problem was caused by him, and the fact that to try to deflect the blame he had a go at you.