Either she had asked him about the spanker sail, and the Captain misunderstood the question, or else she is learning the difference between starboard and larboard as he demonstrates each on alternate cheeks.
Now she’s gonna be too shy to ask the Captain about his mast.
"...the girls are prepared in the reformatory’s punishment room, naked, lying on their backs on special benches, bound with their legs spread above their heads, shamefully showing the two holes usually hidden..."
Either she had asked him about the spanker sail, and the Captain misunderstood the question, or else she is learning the difference between starboard and larboard as he demonstrates each on alternate cheeks.
Now she’s gonna be too shy to ask the Captain about his mast.