sex."

"I promise to do so, if they arise naturally from the pictures."

The lesson lasted two hours, and a hundred times did I curse Aretin and
my folly in shewing her his designs, for whenever I made the slightest
attempt the pitiless woman threatened to leave me. But the information
she gave me about her own sex was a perfect torment to me. She told me
the most lascivious details, and explained with the utmost minuteness the
different external and internal movements which would be developed in the
copulations pictured by Aretin. I thought it quite impossible that she
could be reasoning from theory alone. She was not troubled by the
slightest tincture of modesty, but philosophized on coition as coolly and
much more learnedly than Hedvig. I would willingly have given her all I
possessed to crown her science by the performance of the great work. She
swore it was all pure theory with her, and I thought she must be speaking
the truth when she said she wanted to get married to see if her notions
were right or wrong. She looked pensive when I told her that the husband
destined for her might be unable to discharge his connubial duties more
than once a week.

"Do you mean to say," said she, "that one man is not as good as another?"

"How do you mean?"

"Are not all men able to make love every day, and every hour, just as
they eat, drink and sleep every day?"

"No, dear Leah, they that can make love every day are very scarce."