Dd has just turned 2 and for a few months now, has had a 'thing' about dirt. If she spills food on her trousers/top, and especially if she picks up a bit of fluff/soil/random-bit-of-detritus on her hands, she can get quite upset. She'll shout 'dirt! Dirt!' and on some occasions, there are tears until I've brushed it off, used wet wipe to clean top etc. What do people think? Is this just a weird toddler thing, or something more sinister? Dh and I have joked about OCD, but when I saw dd playing in the sandpit and meticulously avoiding getting any on her palms, I started to wonder. Fwiw, we aren't particular 'clean freaks' so don't feel it can have come from us being over anxious in this area....