One I would like to know more about:

There's a boy across the river with a bottom like a peach
Alas, I cannot swim

which was apparently sung by British troops in Afghanistan in the 19th century, to the chorus of the tune known in pipe tune books as "The Pathan War March" aka "Zachmi Dil" ("The Wounded Heart"), and probably more familiar around here as "The Quartermaster's Store". It's quoted in Lewis Winstock's "Songs and Music of the Redcoats", and I've come across it elsewhere (maybe in a book by John Masters?). But I've never come across any other words, have no idea what the Pushtun text is, and know nothing further about its history.