The lasso d'amore is a musical instrument made of corrugated plastic tubing, employed in some P. D. Q. Bach compositions such as the Erotica Variations. Musicologist Peter Schickele gives a tongue-in-cheek explanation of the instrument's evolution: Viennese cowboys twirled "their lariats over their heads with such great speed that a musical pitch was produced. ... The modifications that had made this development possible rendered [the lasso] useless for roping cattle."