This is by far the most important thing to understand of all of these if you're a dude looking to at all be serious with a woman. You need to know her history and how you stack up on 3 dimensions: romance, sex, and finances.
Sex is by far the most important of the 3 because for women it creates or becomes confused w/ romance for them. You can be the best a chick's ever had or will ever get on finances and it will never be enough if you don't make her feel desperate for you in the other 2. You can have a girl because your money is right, but that will always be your weakest link to her vs. the other 2.
If there's a dude who you suspect delivered on all 3

, but was her first...chances are you will always emotionally share that girl.
Likewise, if you deliver on all 3 for a girl, you will at the very least always have a little piece of her. Depending on her values that can mean she's just someone she thinks "what if..." about even w/ her new dude, or she's a text away from you from destroying her entire current relationship.
I'ma say "Yes, but...". Yes, but there are different levels to this. You always always always have to look at a girl you're messing with and first ask yourself "

...Why is this girl still on the market?". Then you have to be honest with yourself about why and like the answer. I've dated girls where the answer has been career, lack of "upward dating" prospects due to where they live / their profession.
I look back on exes or girls, and if I were to have a conversation with the next dude it would be (girl by girl):
- She's mentally off
- I can't hold an intellectual conversation with her
- She's cool, I was just 20 and an a$$hole
- The sex is trash
- Could've been GOAT but has a terrible, self-defeating attitude
- I can't marry a white chick
So if I were another dude...maybe some of these are OK, but some of these aren't.
It's imperative for you to figure this shyt out and figure it out early. And never, ever, ever ask a chick this straight up because the most cunning ones will always have their sales pitch ready (exes weren't shyt, etc. etc.).
When I was younger, I'd love running into chicks where I'd figure out the truth first, but knew exactly what buttons to push to get the best out of 'em. Manipulative, yes, but the game's the game.