Rats cannot be sick, says Bill Bryson. Not many people know that. Rats can have sex 20 times a day. Further down the same page, we read that they also sleep 20 hours a day. Do the sums. Rats must fornicate five times an hour in their waking period, as well as eating rubbish and not being sick.
Victoria Glendinning
Home and away
Rats cannot be sick, says Bill Bryson. Not many people know that. Rats can have sex 20 times a day.

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