Nun fisting sex
Strict monastery rules instruct the nuns not to even think about sex, because it is scary to think what will happen to a sinful soul that wants to take someone’s sinful organ inside itself. However, hand is not a cock, and there is no such restriction about it in rules and unfucked hole itches so much that it is simply impossible to resist the temptation. Many nuns think that sometimes letting a lover's fist inside the pussy is possible, and he, considering her inaccessibility, is even glad of such an experience.