I finally looked at the pics...I hadn't realized that they're not even screenshots, but photos taken of the screen with another phone. Insanely easy to fake, even without Photoshop. Also entirely possible: a) Some are real and some are fake. b) They're all real, but missing context showing that he wasn't being serious (still gross, but who knows).
If they're real and in-context, then it's shitbag behavior, but not the kind that isn't correctable at the age of 20.