Most overt or covert behavior is given a gender by the society.
Step-by-step explanation:
The expectations of gender come with different sort of things that boys and girls are supposed to do differently. Which is as simple as body language sometimes or as complex as mingling habits and way of talking.
There are times when people are told that they talk like or walk like the opposite gender which is due to a set stereotypical example everyone either lecterns to follow or never knows any better from.
We all are complicit in this as we learn the norms and try to act accordingly.