It would've been terrible if they cast average actors, but thankfully the stellar cast keeps the movie watchable and mildly entertaining until the end. No one in their right mind would say these things, and no woman in their right mind would react positively to these things. It turns the characters into caricatures at times because of how fake it is. The dialogue for the most part is asinine. You don't believe these relationships for a second. There are a couple chuckle-worthy moments, and some clever banter between the three guys, but most of the comedy falls flat and the romance is absolutely insane from beginning to end. It's certainly watchable due to the three leads, but ultimately you're left wishing the movie was good enough to accommodate for the acting talent.
"Let's all make a pact to not get into a relationship! Let's keep having sex with random girls and never fall in love! High-five!" It's such a dumb premise, and it's like the script keeps wanting you to hate these characters until they "redeem" themselves by the end but again, it's so artificial that you don't buy a second of it. And I know that's usually the case with romantic comedies, but this movie takes it a step further and totally demeans women every chance it gets, and I'm not one to point out misogyny in movies, but it just gets stupid after a while.
There are some lines in this movie that no one would ever say. Unfortunately, the material they have to work with here is artificial and stupid. I would watch an Entourage-style show between the three of them and their antics, it's that believable. They've proved it time and time again, and That Awkward Moment is held afloat because of the chemistry between these three actors.