Biologically, sex is designed for one major purpose, PROCREATION any other thing is extra.
The female reproductive cycle comes out once
a month, for the man is every day, for each sexual act the woman one egg is
match by the man one hundred and twenty million sperm cell.
Let do some calculation, a one hundred and twenty million sperm cell a day are supposed to one egg every month, means, assuming all the cells are viable, it will take thirty men to impregnate all the women in the world.
This put a clear fact that a man is by nature polygamous and Fidelity are unnatural beliefs promulgated by religious and societal belief, take that away, every man will cheat its simply biological.
Let looks at the extra, it’s a known fact that women for the most part are more emotional than men, so it is natural after sexual encounter, she will be emotionally attached, a man is logical in nature, there is no emotions involved, and for him it is just a physical release that got nothing to do with love.
A man loves his woman by protecting and providing for her period, it’s really quite simple for a man the physical and the emotional are two separate entity.