Just to say it, The Lemonheads version of this song is the definitive version.
However, Robyn St. Clare of Australian jangle-pop band The Hummingbirds wrote the song. She and fellow Hummingbird and future Lemonhead (he brought the song with him) Nic Dalton recorded this song as part of their side project, Love Positions. The song is incredible simple. It's a love song that succintly expresses the feeling of warmth and security one finds in true love.
The original arrangement of the song is sparse - St. Clare on vocal, Dalton on guitar. There's a lot of beauty in the light arrangement.