In the North London community centre where my Monday night improvisation workshops are held, there is a poster on the wall (of a room usually used for a childrens' playgroup) that is what Larry David would call "a big bowl of wrong".

For several weeks I've been meaning to take a picture of it before someone else spots what I've spotted and destroys it in the name of all things decent and wholesome; last night was the final session of the term so I made a point of capturing it on my mobile phone.

(NOTE: As an exercise for the reader, write a list of separate ways in which this poster is just plain wrong. If you don't get at least seven, then you're really not trying...)

Here it is in its full glory:

Now here's the thing. Somebody had to put those kids in that position and think it was okay take a photo. I don't know whose idea it was to have one kid standing immediately behind the other whilst grimacing and holding his ears, but if that person is an adult they should be in prison.

Now I appreciate that we can't lay the blame entirely at the photographer's feet. Anyone can have a temporary lapse of judgement.

But someone at the marketing agency had to approve the photo, presumably by selecting it from a number of different photos taken during the same session. Someone had to look at that photo and think to themselves: "Yep, that's the one".

More worryingly, if this photo was the best and most suitable of those on offer, then I'm afraid to imagine what the kids were doing in the other shots.

One boy having a playful "tinkle" in the other's mouth, perhaps? Or one boy crawling around on all fours in a gimp costume while the other boy rode around on his back wearing a cowboy hat and smoking a cigar?

And once someone had, hard though it is to believe, selected this image from its photographic peers, then they or someone else in the same department decided that the best copy to accompany the photo was "Maximum Fun, Maximum Protection".

Without the Nivea brand in the frame, this would look to all the world like a shockingly ill-conceived attempt by Durex to break into the pre-teen market.

To continue: someone senior at Nivea then presumably had to sign off a paper proof of the poster and then someone else at the printers had to agree (albeit implicitly) that the best thing to do with this image of sexually ambiguous, prepubescent roughhousing was to produce several thousand hard copies for wide distribution amongst the nation's schools and playgroups.

I think I may, for the first time in my life, write a letter to the Daily Mail...