How do I tell dh that he didn't flush the toilet?

[WomanOfPine]

I have just finished feeding dd and quickly went to the downstairs loo, where I found that dh didn't flush the toilet after doing a number 2! I'm so disgusted!
And oddly enough, there was no paper on it....this would explain all the skid marks on his under wear
I don't get it! What is it with not wiping your bottom after doing a number 2???
Every time I do the laundry I don't dare to look at his underwear, I just quickly throw it in!
I'm so disgusted by this and don't know how to talk about it with him? Or do I just keep quiet?
Although this was the first time he left the loo like this, but I feel I should voice my concerns over it.
I just don't want this to happen again! I almost threw up!!!
Apologies for the disgusting thread...
What would you do?
What would you say?

I find a passive aggressive poem often works.

That's not my toilet, it is not flushed
That's not my toilet, it has not seen a toilet brush
That's not not toilet, it smells of a horse's fart

Oh poo, posted on wrong thread..

I think the tissue flushed but the turd was a floater.
The skidded would be a deal breaker for me though