Okay, if I remember correctly, the purpose of this drawing was to put Tetsuko in a deliberately too-small swimsuit.

What possessed me to draw the tufts of pubic hair peeking out through the leg holes I don't know; but this drawing was probably the genesis of the idea that Tetsuko has a, shall we say, "generous" thatch of fur crowning her, shall we say, "womanhood". (He said, euphemistically.)