Yes, folks, it's the latest battle in the War of the Toilets. Alas that I cannot install a urinal and a pin-locked girls' loo...
But I will not be defeated! Occasional battles may be lost, but victory will eventually be mine!!!! Or they will all move out. And I will probably miss them, and look back and sigh, "O how I miss complaining about stinky loos."
What you might do is encourage your boys to SIT TO PEE. Standing to pee is a privilege earned by those who do NOT PISS OFF MUM.
Let your little engineers invent a push button floor remote that controls the seat so that when they stand by the toilet to do their widdles it activates the seat making it raise up and when they step away from it, it descends. TA DAH!
You can patent it! Make gazillions! Retire to the Caribbean even!
p.s. of course the push button will have to be to the side of the base of the toilet in the vicinity of where the toes would be positioned if facing the toilet, so that one does not accidentally step on it when sitting, otherwise one would be caught in a very uncomfortable, compromising position.
p.s.s. my word verification was: