"Second Nature" is a song by American singer-songwriter Dan Hartman, released in 1985 as the fourth and final single from his fifth studio album I Can Dream About You (1984).

The video features a truck of watermelons crashing, with the incident causing people from varying backgrounds and ages rushing to the scene.

Hartman, who is originally seen playing guitar from a window in an apartment block, brings his portable radio down to the scene and begins performing the song.

[9] The video was shot in Los Angeles and features the Pierce High School Marching Band and the Jefferson High School football team among other people (Hartman's close friend Glenn Ellison and co-songwriter Charlie Midnight make appearances playing the parts of paramedics).

[13][14] On the musical variety show Soul Train he performed both "I Can Dream About You" and "Second Nature" minus his band, but with live vocal.

[18][19] In a review of I Can Dream About You, Brian Chin of Billboard described "Second Nature" as "bouncy neo-Motown" and a "great uptempo number".