What is the etymology of the word commitment?

com - together

mit - (from the Latin - missio) to send off, still used in English in the Word "mission"

ment - suffix for a continued action, to the point of institutionalization, something you do for as long as is needed or promised. like government, or basement (yeah, I don't get that one either...)

so putting those together we get:

sent off together, long-term. as in "Women also need to commit to a relationship, and aren't committed by default as has been previously believed (mostly by women), and their expectation that men in general somehow have a problem committing is largely a myth perpetrated by a few bad experiences, where actual US Census Bureau Statistics show that women are twice as likely to be the cause of breakup either by cheating, or just plain running away."

A 'committed' relationship is exactly what it sounds like; you're 'crazy'. ~ Me, just now.