a) even if you wanted to have constant sex with your "hot" wife/girlfriend/etc., she's going to limit that to what her desires are. Meaning, after she feels established, she no longer has to use sex to "keep" her man and safe-guard her catch. This is the basis of the old joke that wedding cake is the ultimate form of birth control. And the other 23 hours of the day with her might make the hour of physical enjoyment irrelevant, anyway.
b) attractive women almost always know that they are pretty (if you ever find one that doesn't, propose immediately!). Despite all of the mental body issues that most women have, attractive women usually define themselves by their attractiveness (at least in part). They know they are hot, and expect to be treated like it. This form of arrogance might be fine (or even alluring) on a limited basis... but relationships with self-centered people aren't particularly enjoyable, no matter how "hot" they are.
c) pretty people tend to be more demanding (especially of others). If they define themselves by their image, they are going to be very concerned about your effect on it. Meaning that they are going to want you to behave/act/look in ways that makes them look good (according to their definition)...
I once dated a TV reporterette. She was hot! She also wouldn't let me touch or kiss her while we were out (I might mess up her clothes or make-up!). She wanted to remake me to fit her image ("You can't go to the store dressed like that! Someone we know might see you! Quick, shave, shower, put on something that looks good... I know it's just Lowes, but you never know...") and I always felt an undercurrent of "I'm to good for him" in our relationship.
Needless to say, I dumped her very quickly. Her physical charms were so overwhelmed by her negatives, that I didn't even regret it for a minute. I guarrantee you that the girl in the article (and Tiger's wife) are no different. I'm not defending infidelity or ignoring your girlfriend... but it takes two to tango.
BTW, my wife might not be a swimsuit model, but she's a beautiful woman who is the best (and nicest) person I have ever known. I wouldn't so much as glance at the reporterette again, no matter how well she might have aged. Some things are way more important than physical appearance. As I have been known to tell my students who are a bit too fashion-conscious (or even the occasional girl in college who wouldn't date me), "Twenty years from now we'll all be old and ugly... I'll still be smart..."
Second that. But there are some pretty gals who are really sweet. Those are the best ones.
“relationships with self-centered people aren’t particularly enjoyable”
Then Elin must have been really miserable, even before Tiger’s dalliances were exposed.
And these kind of women are always the ones wondering why they can't keep a man, no wonder how hot they may be.