On this week's 'Whitney' (9:30PM ET Thursday), the title character and her boyfriend discover that there are still key things they don't know about each other.

It starts off harmlessly enough -- Whitney (Whitney Cummings) quizzes Alex (Chris D'Elia) about his love of racquetball, a sport she didn't even know he played.

What else doesn't Whitney know about Alex? A fair amount, as it turns out.

Find out what Whitney discovers below.