Does anyone remember the saying
if it's yellow let it mellow, if it's brown flush it down?? That was popular a few years ago during a drought in California...
No excuse for not flushing and closing the lid when visiting..I would go ahead and tell him if he visits again.
reminds me... LOL we had a unisex bathroom at a place I worked and behind the toilet our boss had a sign saying..
we have sitters and pointers, please close the lid.
another of his signs was
your mother doesn't work here, clean up after yourself.