Bernie doesn't really have any sexy songs lyrically but there are a few songs where his voice sounds sexy.

Backup Plan - The way Bernie's voice blends with Emmylou Harris's on this song is sexy

Rotation - The music on this song and the way he sings this one is sexy.

Bitter Creek - Bernie's voice and the music in this song are sexy.

Train Leaves Here This Morning - Bernie's voice on this one is sexy.