That's the world NOW. It's not the world Trump grew up and lived in until recently.
In that world, if you like a girl and thinks she likes you, you put a move on her. Kiss her, grab her breasts, grab her ass, or grab her pussy. Seriously. The bigger the alpha, the bigger you go. If the girl doesn't slap the hell out of you for it, or doesn't say "No stop that" firmly, then she is consenting.
That's just how it USED to be, and that's the world Trump came from. Girls played coy and weren't supposed to let guys know that they liked sex as well. That really started changing with the free sex free love revolution in the 1960s. But it took only took a few generations to get to the point you have to CONSTANTLY ask for permission. And a girl can change her mind years later, and then her consent of then retroactively makes it rape.
Why? Because legally speaking, women are superior to men in western society. That's due to all the protections society used to give them to make up for their other societal disadvantages, since they were the child bearers and rearers, and society needs a lot more of those than they need men.
So while what Trump is saying sounds horrible to a 19 year old, it sounds like normal talk by an alpha braggart to people just 2 generations older.
It's like when your great grandmother calls black people negros or coloreds. The times were different when she grew up and the majority of her life so she never "adjusted" her attitude or thoughts.