I come from a girl dominated family and don't really understand boys bits....anyway.
DS is 19mo and has recently started to grab at his crotch making noises like he's uncomfortable - he's quite insistant. Sometimes, he does this when he's had a poo, so I think, ah, he's telling me he wants a change. However, he came back from the CM who just changed his nappy, we get home and he's grabbing and making his noise again. So I quickly take a look and see he has an erection. Other than that, his willy doesn't look red.
SO I'm not sure what's going on: is he gearing up for potty training (telling me when he's had a wee/poo), is he pleasuring himself, or, the one I fear, is it some kind of infection? What sort of symptoms would an infection have? He has no temperature and no apparent redness.