Sexual drive is not “universal”. It is rare when a couple has the same “natural” sex drive.
Most “new relationships” start off on fire but after awhile one person is likely to fade some.
Your appetite for sex may be stronger than one person and less than another person.
There are some women who are married to men that have a lower sexual drive than they do. Sexual desire also declines in some individuals for various reasons including menopause for middle age women, enlarged prostate for middle age men, body image issues, loss of self-esteem, or no longer feeling attracted to their mate.
A recent study indicated 15-20% of all marriages are “sexless”.
(It only takes one person to shut down sex in any relationship.)
The one with desire is likely to “explore other options” rather than go through a messy divorce. Some people don’t believe lack of sex or bad sex is a legitimate reason to divorce. I recently wrote a hub on this very subject. “Sex: Is bad sex a legitimate reason to end a relationship?” https://hubpages.com/relationships/badsexendsrelat
It takes COURAGE to end a relationship especially when it’s (not all bad).
There are some physical differences in men and women that cannot be ignored. The most sensitive area of a woman’s sex organ is tucked away while the most sensitive part of a man’s sex organ is outwardly pressed against his underwear or inner thigh. (Scientist have stated that boys/men ages 15-45 think about sex every 52 seconds!)
Another thing we cannot ignore is men are willing to spend $1000s of dollars hourly to have sex with a woman or throw their hard earned money at the feet of stripper in a “Gentlemen’s Club”. If women were “equally desirous” of sex as men there would either be no such thing as prostitution or women would be paying men to have sex.
What I find fascinating is why people always ask men or women why they cheated.
They already know whatever response is given to them will be deemed as “unacceptable”, considered “a B.S. excuse”, or a “selfish reason”. Why do we ask “why” when we could care less about the answer? Asking such questions is nothing more than an invitation to give an “explanation and justification”.