Thomasina: I hope you are ashamed.
Septimus: I, my lady?
Thomasina: If you do not teach me the true meaning of things, who will?
Septimus: Ah. Yes, I am ashamed. Carnal embrace is sexual congress, which is the insertion of the male genital organ into the female genital organ for purposes of procreation and pleasure. Fermat’s last theorem, by contrast, asserts that when x, y and z are whole numbers raised to the power of n, the sum of the first two can never equal the third when n is greater than 2.
(Pause) Thomasina: Eurghhh!
Septimus: Nevertheless, that is the theorem.
Thomasina: It is disgusting and incomprehensible. Now when I am grown to practice it myself I shall never do so without thinking of you.