Dating in your late 30s and onwards as a dude with your life together is unbelievable. The tables have completely flipped and you pretty much have your pick of whatever you want.
Also - completely unrelated to dating, or marriage or whatever. I was completely unprepared for the first time I interviewed a young, attractive woman for a position and she told me in basically the most direct way possible "if there is ANYTHING you need to see from me for me to get this job, just let me know."
I'm 46. I'm married, I've got a pretty good moral compass, I like to think I'm a pretty ethical guy. I treat people fairly, and I act with integrity.
And then you realize how easy it is to fall into that trap. Because you've got someone sitting here just begging for this and she's willing to use whatever she has to get it. That's 100% how people get corrupted into sex blackmail or money or whatever - and this was my first brush with it. You think this shit only happens to Hollywood scumbags or politicians and then next thing you know you've got a chick asking if you've got a casting couch, and there's a part of you thinking "well maybe...." before you shake your head out of it because this could legitimately ruin everything you've ever built and done.
I suppose it's the kind of lesson you need to have enough life experience for before you get to it, and just hope you've learned enough to pass the test.