“So if we're all quarks and electrons ..." he begins.

What?"

We could make love and it would be nothing more than quarks and electrons rubbing together."

Better than that," I say. "Nothing really 'rubs together' in the microscopic world. Matter never really touches other matter, so we could make love without any of our atoms touching at all. Remember that electrons sit on the outside of atoms, repelling other electrons. So we could make love and actually repel each other at the same time.”