"What Is and What Should Never Be" is a song by English rock band Led Zeppelin on their 1969 album Led Zeppelin II.
In the That '70s Show 2-part episode titled "What Is and What Should Never Be", character Steven Hyde (portrayed by Danny Masterson) wears a t-shirt advertising Owaneco Motorcycle Service, an actual motorcycle repair shop on Illinois Route 29 on the south edge of Owaneco.