At 27 or 28, that'll change FAST. The little clock in their head goes off. I've seen it a zillion times. young girls, with the hottest guy, having a blast. Whoever they're dating the minute they turn 27 is "the ONE". They'll get hitched to any guy, even the wrong one, because they NEED a baby. They'll stick it out til the kid(s) is in kindergarten and be back in the dating scene at age 33-35, a changed woman.
Very few 30 year old girls in the club. They have their toddlers then. It's almost a science. I know SO many 25 year old girls, I tell them about the bio clock... and they come to me when they turn 27/28 and admit it's killing them.
And yes, at 35, a girl doesn't care if a guy is bald or has a little belly. If he's nice, doesn't do drugs, won't bang her friends, makes at least 20k a year, and is safe with her kids, he is IN.
I play with like 3-4 different bands, hired gun. bass & guitar whenever I want to play. Most musicians are total dogs. I seriously turn down sex on a regular basis (unbelievable I know lol). Married and really, it's not worth the drama for a quickie in the truck. I'm a rarity in the bar scene (decent shape, guitar/sing at 36) and I don't hit any of them. most guys in bands age terribly or very well... terribly if drugs are a problem... very well because they never have kids or just don't take care of theirs. You can always tell the balding guys - they either take care of their kids, or they work out. Rare is the full head of hair at 37 if you have kids and train. You'll have it at 35. Not 37 
Let's just call it what it is...desperation.
Many women today in their mid to late 20s want to get married, and focus more o the wedding than the actual marriage. The thinking is "if it doesn't work out, there is always divorce", so many times they marry the first slub that asks them, knowing full well it will not work out (replicating what they see with their parents?)
As we all know, by late 20s-early 30s is when the baggage starts, like a high mileage car.
She may or may not have kids, is concerned more about her career than her kids, and still wants to have her fun. She doesn't care too much about looks in the man, because, again, desperation. An attractive man will not stay, he has too many options, and knows it. A dude with a spare tire and is financially stable will put up with more, and deal with her kids...he is the "safe guy".
Of course, this again doesn't work out (could be 1-4 yrs down the road), and again she is dealing with dudes who have their own kids, and are somewhat established (Grionk, maybe?), they agree that "hey we aren't getting any younger"...
At the same time, many of these women go back to the bar scene and are picking up dudes in their 30s and 20s, yet cannot understand and deal with the younger mindset. Also, at the same time, a lot of women at this age have an established career, yet personal happiness is nil.
The loser in all of this mess, is the kids. Throughout all this shuffling there is no stability.
The winner in all of this are drug companies (for depression, anxiety), psychologists, psychiatrists,
Self help authors, gym chains, and of course bar owners. And lastly, the Judicial System.
Basically and Industry that makes it money off of the social breakdown of today's America.
