THE PRIEST DOES NOT HAVE A HARD-ON. I repeat, the priest does not have a hard-on. I've seen the scene in question. Freeze-framed, no less. They're his knees. He has really short legs, so his knees are fairly close to his body. In one frame his robe is above his knees, and when he bends them, the robe covers them, creating an erect bulge. THEY'RE KNEES.
Thank you.