I got stung by a wasp once, due to squashing it by accident, oh - and bitten by a horsefly, but other than that I can't recall ever being bitten or otherwise damaged.
Most things seem to have me down as 'Harmless, will probably give food' so any dog - for instance, walking past immediately stops walking past and tries to convey 'Hello there, feed me?' or at least get in a few wags before towed away by the lead.
At Sidmouth a few years ago a ferret on a lead was in the Middle Bar at the Anchor - made straight for me so I reached down and stroked it. The owner was surprised and said I should be careful - I was just thinking the same thing about her, poor little ferret could have been stamped on...