to be slightly prude about this.....

[M44]

dh thinks it is hysterically funny to have put up posters by the urinals of pretty, cleavaged women who appear to be peering over their glasses at the manhood peeing.
I find it fairly unfunny; demeaning to women; demeaning to any man who has impotence or problems; sexist; demeaning to those in the medical proffession etc.....

I am a little prudish at times but I think this kind of humour is sexist and archaic.
He is now in a foul strop with me......and I with him. Sad as I am cooking his favourite supper.

because he was part of the design team fro the urinals

So he was part of it, but there were other people who presumably had an equal say. And many men (and some women) would find it amusing - in my opinion it's better than boring tiles and dirty grout!

Not worth getting your knickers in a twist about.
Yes it's childish but I can see the funny side!

I don't think YABU. It's sexist and childish. You wouldn't think it was OK if people were sticking up posters of busty pouting women on the walls of their office - it's no different, IMO.