Questions

There are things that will benefit us more than men and other things that's more suitable for the man. Putting aside your own feelings and going for what's more beneficial for other gender (prefering their happiness over your own, even over your own safe zone) is actually a sacrifice, since you're placing someone else's needs and happiness even at the cost of losing yourself. You know you won't win much but you don't care at that moment and give in anyway.

Nowadays which gender does that the most, men or women? I think it's women now. Several long-term relationships are ending in break-ups and the woman ends up sad her time and years were wasted for nothing. She gave most of her prime years (her market value) and lost. Then she'll just be another forgotten past ex girlfriend. Sometimes that very same man finds someone else and forms a family with her within 2 years or less, much less than the time that woman gave away for nothing. She didn't benefit from that.