Masculine = things men do
some examples from men I know; computer programming, flower arranging, starting fights in pubs just for the crack, dressing in girls clothes, riding motorbikes, empathy, bicycling, not giving a **** etc etc.
Then again, I also know women who do all of the above.
I think a detailed definition of masculinity is ultimately just an attempt to control the behaviour of others. We are what we are and that is what we should be, first and last, not somebody else’s label.
The interesting thing here is the number of responses by picture.