No desearás al vecino del quinto (Thou Shalt Not Covet Thy Fifth Floor Neighbor,[1] released in Italy as Due ragazzi da marciapiede) is a 1970 Spanish-Italian sex comedy film directed by Tito Fernández and starring Alfredo Landa, Jean Sorel, and Ira von Fürstenberg.

A massive box office hit in Spain, the film became a linchpin for the mega-successful and profitable formula of Spanish sex comedies.

[2] In Toledo, a provincial town, Andreu, a handsome gynecologist, opens his practice without any success, as he is too attractive for the husbands and boyfriends of his patients not to be jealous of him.

There, the doctor is frightened to see how Antón, his neighbor from the fifth floor, without a wig and displaying all his hidden masculinity, is having a great time between two beautiful women.

Stewart King and Jeff Browitt consider the film to be the "most representative of a highly idiosyncratic comedy genre that flourished in Spanish cinema in the last years of the Franco regime".