Well, thats the chance I guess i'm willing to take... again. There are divorces, affairs, infidelities happening all the time which causes a partner to leave, and 99% would have nothing to do with cuckolding. Also, aside from the sex, I provide my wife with a very, very comfortable life and lifestyle... plus she is quite alpha and controls most of our relationship, finances, decisions etc. which she loves.
She was previously married to a very well endowed, 6'3" alpha male (was an elite soldier) and aside from the sex, hated every part of being with one. Was great at the start, the man of her dreams, the envy of all her friends, fucked liked a machine every day, but with that... many other women wanted to fuck him, and most of the time he obliged, behind her back. He was a serial cheater/ liar because he could be.
I offer my wife a life of trust, loyalty, strict monogamy, stability, financial security, friendship AND the freedom to have sex with other men when she needs to tick the one box I can't for her. She admitted years ago, if she couldn't cuckold me when SHE wanted/ needed to, she would almost definitely cheat on me like my ex's did, but because we are so honest with each other, she has no need to or ever felt the need to.
She actually has less sex with other men, because she has the freedom to whenever she likes and when is convenient to her, and not constantly secretly cheating on me because she is feeling trapped in a somewhat sexless marriage.