If I remember correctly I think about 2-3 weeks for my son to do it on a regular basis. He raised his head at birth when they first laid him on me but for a regular thing it took a bit longer.

I think some people hit "like" so that they can go back to that post later and read if anyone has answered. like if they think it's a good question and want to also know the answer. Cuz there's an option to see your activity so if you look at your history you can see anything you've liked, etc. I don't think women are liking it just to like it. I'm sure they want to come back to it and see if anyone gave an answer.

about 3 weeks old for my bug :)