His intense feelings for his girlfriend may lessen his desires to look elsewhere for sex.

But once those intense feelings of chemistry go away (as they usually do after 18 to 36 months – just long enough to conceive and raise a young child), his attraction will still spike every time he sees an attractive woman, in some form or another.

But make no mistake, monogamy is a choice, not a natural state.

Anyway, in my estimation, the male sex drive has nothing to do with kindness or personality or compatibility.

–Cat Dear Cat, Thoughtful and provocative question, and I’m going to attempt to tackle it even though I’m no therapist, historian or biologist.

First off, I want to acknowledge that everything you wrote, in my estimation, is true.

Men, regardless of relationship status, get a chemical high in seeing attractive women.

Men can appreciate the female form, either clothed or naked.

Because they’re so important that they don’t think the rules apply to them.

Because they travel a lot and are frequently exposed to temptation.

Because they don’t value their wives as much as the thrill. Some men couldn’t conceive of having sex with a woman he didn’t love.