Because ttfn bought a book - 'Would you believe it - Usless information you can't afford to be without' many, many moons ago. I now know so much trivia I ought to socialise more and impress folk. But as I don't get invited anywhere, AB will be my (un)willing victim ☺
I haven't been present when the pig has its orgasm but someone must have. Evidently it was reported in 'The Farmers Weekly'
The other things are quite common facts told on 'Blue Peter'