Overview
The Miracle of P. Tinto is a 1998 Spanish surreal humour film directed by Javier Fesser.
Plot
The story is told in a retrospective way.
P. Tinto was born obsessed with building a big family and soon enlists a blind girl, Olivia, in his big life project. However, despite his best intentions, the couple is unable to have kids due to their incompetence to understand the sexual innuendo of the adults and they spent the most of their lifes trying to have kids just by pulling the suspenders in and out and singing "tralari, tralari".
After several years without having any kid, the now elder couple decide to pray for a miracle and that same night a couple of martians ends up stranded in their door. P. Tinto, thinking they are children due to their short stature, decides to adopt them and treat them as kids, despite their protests and their adult behavior.
From Wikipedia (CC BY-SA 4.0).