Lyric discussion by Solinus 

Cover art for Suicide Is Painless lyrics by Johnny Mandel

A great song from a great movie, this song encapsulates the frustrated irony of MASH.

Anyway, its supposed to be ironic, not serious. Its not pro-suicide. Used in the movie MASH, specifically in the instance that a dentist was considering suicide because, as I recall, he thought he was gay. (which he wasn't, he was just disturbed)