Love, Money and Philosophy(1996)

Original title: Cuori al verde

Stefano, a philosophy grad student without a future, tries to commit suicide after his girlfriend leaves him. He is saved by Giulio, a wisecracking plumber who takes him home and teaches him the tricks of the trade. When Lucia, a woman disappointed in both men and conventional jobs who has started to work as a prostitute, calls them to repair a sink, for Stefano it's love at first sight.