Quote of the Day/Night unlike most other such things

This is from pp. 417-418 of Andrés Neuman's El viajero del siglo, roughly translated:

Sophie spoke of her need for independence, of Rudi's family plans, the touch of her fiancé's buttocks above the breeches, of how she imagined sexual life with him, of the most bent penises that she had seen, of the curiosity which she felt in regards to semen, of her menstrual problems. And following that, bizaarely, she spoke of Kant. According to Kant, said Sophie, to kill a bastard son is less grave than infidelity...

Kant and menstruation, thought Hans, why not?