i can t understand at all why women accept skirts without freedom of comfortable sitting. we have to liberate them as well
I wouldn't worry too much about liberating women. They've done just fine on their own. In fact, they've quite deliberately chosen not to bring us along with them as a matter of strategy:

"Objectively, men as a group have vested interests opposed to those of women as a group. We will, for example, cut into their jobs, challenge their position of comfort in the family, and take personal power away from them. In the short-run, and in some ways, men are an enemy."

"Too often our actions contradict our knowledge that originally brought US together——you cannot overcome social problems with personal solutions. Thus a "position" on men should be tactical: it varies with the real circumstances. A position on men is not our program. Sexism, not men, is our politcal enemy."

http://www.cwluherstory.com/CWLUArchive/socfem.html

If our aim is to get more men into kilts then it's not good strategically or tactically to encourage women to wear them.

When kilts become popular with men, women will wear them, for any number of personal and political reasons.

If women begin wearing them before they catch on with most men, then kilts will be lumped in with skirts and most men won't ever wear them.

First things first.

We need to liberate ourselves.