Hero
By most reports the Playboy Bunny was also a 20 something so right in the age range he goes after.
I do not think that DJT set out or "wanted to fuck a porn star"
Here is what we know about DJT
He sets out to do very little.
He falls into a lot of things that others have started and then he co-opts them and claims or at least acts like they were his idea from the start. "The Aprentice" was NOT DJT's idea, Mark Burnett came up with that, he wanted a "spinoff" of "Survivor" the same basic idea, "tasks","alliances" "backstabbing" and other gossip and intrigue and of course "getting voted off the island" AKA "you're fired" You can say the same thing for the way he co-opted the "birther movement"
He is all things considered "lazy"
By all reports he spends no more than 5 hours in and around the oval office, not counting "lunch" and "executive time" and that is on days he is in DC at all.
He "lives in the moment"
He plans nothing, does not consider the consequences, sees something and goes after it, or not
He has absolutely no "impulse control"
So I do not think he set out to fuck a porn star not in Lake Tahoe not ever. I do not think he even intended to fuck any woman, Porn star or other wise while he was there. He had just been in Vegas and if he just wanted to get laid because Melania was not yet giving it up then Vegas is "target rich environment" if there ever was one. If you are in Vegas and have money and you want to get laid you are going to get laid in Vegas, you just are. I think he was in Lake Tahoe and some how, some way Stormy Daniels came into his line of sight.
He saw:
She was about the right age.
She was "good looking" "sexy" "beautiful" "pretty" pick your term.
I am sure he had no idea who she even was, but she obviously knew who he was, probably knew she could "play him" she was/is a stripper after all

)
She was apparently "available" IE she was not "obviously with some other guy
She was Blonde, like Ivanna, like Marla, Like Ivanka
She had bigish looking fake boobs.
He could not help himself so he took a shot.
The rest is history