Nuns and Bathrooms

Okay, listen up, not-so-bright spark! You see, a "glory hole" is typically a hole in a public bathroom stall wall used for anonymous sexual encounters. The joke is making a super inappropriate and shocking comparison by saying nuns, who are supposed to be chaste and devoted to God, also have "glory holes." The punchline twists the word "pleasing." In the context of a nun, "pleasing" refers to pleasing God or others through religious devotion. But in the context of a "glory hole," "pleasing" has a sexual connotation. The humor comes from the vulgar, unexpected, and taboo juxtaposition of these two very different concepts. You really walked right into that one, didn't ya?