Mujeres de media noche

"The movie opens with the serial killer butchering a prostitute with a set of six knives plunged in her chest. The story then moves to an antique store where Anacleto works. He is abused by his supervisor yet he always ends up with the upper hand with the owner and with the two female store clerks. The employees of the store agree to pay for a gift to the owner (Jose "Tun Tun" Ruiz). A mix up in the mail ends delivering the telescope, meant to the owner, to Anacleto. He and his friend Leandro start watching girls on the building across. It is between Anacleto, Leandro and his wife that most of the humorous double-talk occurs. This includes Leandro being abused by his Cuban wife who beats him any chance he misbehaves. Anacleto falls in love with a girl (Miss "G") who works as a model. As the story..."

I haven't seen Mujeres De Medianoche, but based on the summary here, it's a straight-up remake of El Chismoso De La Ventana, from 1956. (Which probably helps to explain why they didn't stop and think about the implications of the sex-crimes in the story.)