So, he’s old enough to be your dad, has 2 ex wives, one of whom he’s recently split up with, and sends you sexually explicit messages..
His interest in you is a conquest/ego boost for his flagging mid-life-crisis crisis.
Don’t, for a minute, think he’s actually interested in you as a person.
Any blether about “liking” you and general chit-chat that isn’t sexual is just him charming his way into your pants.
He said “it could be something good”. Nice ambiguous statement there. He means the sex and he’s only saying it because saying “the sex will probably be shit for you because it’s all about boosting my ego” would probably put you off a bit.
As for why you like him? You’re hormones are buzzing from all that sex talk. That’s all.
Like others have said though, you’re both adults and if you can absolutely accept that this is only about the conquest and sex for him and you could walk away without feeling misled/used/hurt/betrayed afterwards, then go for it.
TBH, I'd massively swerve any man who ramps up the sex talk when we're not even dating, regardless of age. Huge red flag right there.