... the sex. That's what Alex tells Lexie Grey. But in the end he ends up on Team Meredith. Of course, she backs off her bitchiness a little bit as well.
Drs. Shepherd, Yang and Grey (the younger) consult with a man about an important medical decision to be made. From "Physical Attraction, Chemical Reaction."
Derek Shepherd (Patrick Dempsey), Lexie Grey (Chyler Leigh) and Cristina Yang (Sandra Oh) in the episode called "Physical Attraction, Chemical Reaction," from Season Four of Grey's Anatomy.
Derek Shepherd (Patrick Dempsey) constantly desires more than Meredith (Ellen Pompeo) is willing to give. How long until he reaches his breaking point.
You can't deny that the younger Grey sister is a cutie ... even if you don't approve of her flirtations with other characters! Lexie Grey has made an impression on viewers in Season 4.
Meredith: [narrating] Before we were doctors, we were med students, which meant we spend a lot of time of studying chemistry. Organic chemistry, biochemistry, we learned it all. But when you're talking about human chemistry only one thing matters: either you've got it or you don't.