A local specialist deli-type company regularly has a stall on my local market. They sell lots of stuff, including meat pies - pasties, that sort of thing. A lot of the stuff is wrapped but the pies aren't, and as I was buying some wrapped cakes I waved three flies off the pies (they are at the front of the stall). That's grim isn't it? I'm in favour of building up one's immune system but is that a step too far??