Yes, I know you perverts all think that this is just a dirty picture of a monk idly squeezing a nun’s tit, but you are wrong! The artist, Cornelius van Haarlem, has depicted a genuine miracle (allegedly):

“According to the legend, a Haarlem nun was accused of having concealed a pregnancy and birth. It was believed that her motherhood could be detected by squeezing her breast: if milk was expressed, the accusation was true. The painting depicts the moment when a monk ‘experienced in the medical sciences’ squeezes the nun’s breast. This is when the miracle occurred: it was not milk, but wine that flowed from her breast. This proved the nun’s piety and innocence.”