You nailed it
>"men do not understand the ability to give freely "
That is very much a truth. Men are guarded, and dole out their security and affections much like the current stock market. I have had good men in my life who just weren't willing to go that extra mile to make it work. Mostly selfish. Or by the time they got it together, school was out.
Some of my best male friends I've known for decades have got the wrong end of the marriage handle. We can all laugh about it.