It also doesn't help that, in a movie about relationships, not a single character shares any semblance of chemistry with another. As best friends, Arquette (Ash) and Getty (Taylor) already felt like an awkward pair. Things don't improve when Getty randomly falls head over heels for Thora Birch (who turns in a surprisingly awful performance - why Thora, why?).
Did the director just assume we didn't need a reason for them to be in love? I mean, they see each other once, share some creepy and poorly written/acted dialogue, and then suddenly they become an item. You'd think they might feel a little ill at ease about the situation, what with Getty's character being a thief, the girl being almost half his age, and the earlier section of the film where Getty repeatedly porked Birch's mom. The director might as well have interspersed a section of plain text that read, "Taylor and April have fallen in love with each other. They're both highly aroused by uncomfortable situations. Just go with it."
That's just one example of the very few plot points (since not many exist) that aren't remotely believable. The other plot threads that end up hanging themselves under their own suckage include a near-pointless series of scenes involving a hot chick called "Fast Bobby" who the friends exchange stolen items with, as well as... uh... Huh. I actually can't think of anything else that really happens in the film. It's mostly just Balthazar Getty macking on a mom and her daughter. Although, you do also get to see Arquette go postal on a dude, find constant new uses for the F-word, and whine incessantly about how his best friend is changing. Gee whiz, talk about excitement.