HAROLD AND MAUDE (1971)

Conceptually very sensual or very conceptually sensual.  Harold and Maude addresses the reason we even care about sensuality - that it makes life worth living.  It's not sensual in the way that you feel all the senses as you watch - which is unfortunate, because I think they could have directed it that way - but it, or something like it, might be required viewing to understand the importance of sensuality.