What does it mean when a guy sharing stories about women trying to seduce him on your first date?

I would need more context. He might be more religious, or like a INTJ like myself be more selective and less likely to immediately trust a person, not wanting a hit and run, one night stand with a loose woman who will flutter away like a butterfly for her next fun conquest, because the relationship literally means nothing to her.

He likes to tell stories.

wrong way for hyping up his desirability?

Guys talk. This is not unusual.

He’s a legend in his own mind!!

It means that he still lives at home in his parent's basement, which means you should run as fast as you can the other way!

he's essentially trying to flex on you.