Long Live Death (1970)

In this highly symbolic romp, a young rebel and his girlfriend are on the outs with their conventional parents and are trying to be part of the political movements sweeping Europe, decrying consumerism and boring old things like civic chorales, etc. They run away to the mountains, get bored and hungry, in addition to being harassed by the local authorities, and return to their parents. There, the young man commits an act of murder and symbolically showers his girlfriend in expensive doo-dads.

Unfortunately the movie Long Live Death is not yet available on HBO Max.