Looking for a bit of reassurance as DS (2 years old next week) has bitten the DD of a friend when they came round this afternoon. He wasn't cross or upset, he just did it. I haven't seen this friend for a while, and her DD is really quiet and gentle, and was so upset when my DS bit her, and stood by the front door wanting to go home. I was mortified, and put him in the corner and gave lots of attention to the little girl. They're both exactly the same age (born on the same day). DS did go through a biting stage about 6 months ago, but only me and DH. I thought DS was really upset about the whole thing, but when DH got home from work DS told him all about it and sounded quite proud . Can anyone whose toddler went through this stage and came out the other side give me some advice and reassurance? Don't want to do any more socialising the way I feel at the moment, and we've got three more play dates this week! I've recently had DD2 who is 7 weeks old, not sure if this might have anything to do with it??