Same thing: barn swallow and red-rumped swallow nest in Europe the summer and winter in southern Africa. So it's not what the bird was but when it was that determines whether it is European or African, not that I am clever enough to claim any uncertainty involvement between birds and LHC.

Merino wool underpants have many of the same properties but are far too warm for long-distance cycling. Perhaps these new-fangled shreddies will be the answer. They won't stop the cyclist's distinctive aroma, but could be an answer to some of the bacterial problems that are neatly summed up in the phrases saddle sores and bum itch.