Luckily I don't know that many people who are like it but there are 2 mums in particular who have this attitude towards their DS's.
I have heard one of them (a friend of mine) say to her DS (2.4) on several occasions "oh xxx toughen up" and "man up" when he gets a bit 'wingey' etc. He is a bit clingy and cries over every tiny knock but my friend doesn't help this as if he does something minor, she rushes over and hugs him, picks him up etc when he is fine really. But then she tells him he needs to toughen up. 
We were all at a party (childs) recently and this boys dad took a toy tiara off his DS and said "you are not playing with that" as is he had done something really wrong. Another friends DH commented on the fact that my DS was pushing a pushchair around. At first I was really confused as to why he was referring to this, then I realised it was because he is a boy with a pushchair.
Another mum is always calling her DS (nearly 3)a wimp and to look at so and so and see that he isn't being a wimp etc.
I hate this. It makes me feel really bad for the child to be told they are wimps etc. I remember being called a wimp by my grandad and dad and it was awful. I just felt so inadequate.