translation.en: When they're involved in foreplay, they're thinking about something very, very important -- and that's having their genetic material remain, 10,000 generations from now.
translation.zh: 当它们进行前戏的时候， 心里想的是非常重要的事情， 也就是把它们的遗传物质万世流传下去。 也就是把它们的遗传物质万世流传下去。