"In Trousers" is a musical by William Finn that premiered in 1979. It is a semi-autobiographical work that explores themes of love, identity, and the struggles of being a gay man. The story follows a character named Mickey as he navigates his feelings and relationships, particularly focusing on his romantic entanglements. The musical is known for its emotional depth and unique score, blending elements of pop and theater music. It features a series of songs that reflect Mickey's inner turmoil and desires, making it a poignant exploration of self-acceptance and the complexities of human relationships.