This is a screenshot from "L'été meurtrier" (One deadly Summer), a French movie with Isabelle Adjani. The plot summary (from IMDbPro): In spring 1976, a 19-year-old beauty, her German-born mother, and her crippled father move to the town of a firefighter nicknamed Pin-Pon. Everyone notices the provocative Eliane.
A long time ago, in some places in France (in Hérault, but also in the Cevennes and in Provence), there were men who were called "tétaïres". They were assigned to assist women breastfeeding by suckling their breasts, for example to promote the flow of milk, or when breasts were engorged (especially if the baby had died), or even to give the nipples an appropriate form.