Things Bach definitely doesn't want to think about, if he ever again wants to have sex with a woman. Will manage sex with a woman. Will find a woman who will want to have sex with him. The whole Essie thing turned him into a disaster.

There's a question peeking in Isaac's chorus, and Bach gets there just in time, covering the boy's mouth before he can finish his 'how'. "He's a bit late with his question stage", he apologizes. "It's a lot of biology about how the baby got in and is going to come out, you don't want to know that just yet."

"Do", is Isaac's muffled reply. "Do!"