"Cum Eating" is the seventeenth episode of the third season of Grey's Anatomy and it features a shocking sex scene that nearly makes Alexa Grace a star. After she and Dylan O'Brien kiss in the elevator, he asks her to come back to his apartment. When she does, she lets him know that she is going to have a screaming orgasm. It seems that Alexa Grace has decided to take over the role of a good cocksucker from Dylan O'Brien. This may be the start of an amazing and long-lasting relationship between the two on Grey's Anatomy..