We Called It Mr. Pinky (S03E05)

After a woman Charlie has been having sex with professes her love for him, he responds inappropriately and suffers from impotence. Later, Rose explains that Charlie's inability to have a long-lasting relationship is due to unresolved issues with his mother. Meanwhile, much to Alan's chagrin, Jake approaches Charlie for relationship advice regarding a girl at school who likes him. (Warner Bros. UK)