It's my mum's birthday tomorrow, and thus I went to buy a card.

The range of cards supplied by High Street retailers is poor. That's probably why I usually make them. But for some reason I imagine parents don't appreciate home-made cards in the same way that friends do. Anyway.

One of the hilarious cards featured two scientists, one drinking a glass of white liquid. The caption was the other scientist saying “Has anyone seen that glass with bull's semen in it?” Yes, I know, but calm yourselves, because there's plenty more where that came from. Another had a picture with a typewriter on it and the caption “On closer inspection, it seemed that Dad's car boot sale purchase had not been fitted with the promised Pentitum processor.” Unamusing, certainly. And it says “Pentitum”. Not “Pentium”. Why didn't, someone, at some point between dismal idea and well-stocked greetings card, stop and say “hang on. we have an error.”

Or maybe I'm just being stupid and there's a double joke in there that I'm not spotting.

But I don't think so.