Yohami requested a rebuke for himself and others in his lifestyle, and it would be unloving of me to not provide one. This started as a comment but it was suggested that it deserves its own post, and I agree:
The lifestyle you are living is sinful. You are greatly harming yourself and the women you are with, not to mention countless children and husbands who are or will be in the picture. You aren’t leaving them better than you found them, you are leaving them worse off (as you are harmed by each time as well). You (and her) are using people for your own selfish pleasure, and the cost to yourselves and everyone else involved doesn’t matter to you.
As Heartiste explains:
It would be wise for you Don Juans to remember that, the next time you rationalize that your leaving her will actually make her a better person. There is no spinning away the ugly reality with a sappy cliche. Better to embrace your wicked choice and feast on the brutality of it all. Makes for a more invigorating life.