People who don't see their nature and imagine they can practice thoughtlessness all the time are lairs and fools.
The Dharma is the truth that all natures are pure.
Once you see your nature, sex is basically immaterial.
Our nature is the mind. And the mind is our nature.
To enter by reason means to realize the essence through instruction and to believe that all living things share the same true nature, which isn't apparent because it's shrouded by sensation and delusion.
To find a Buddha all you have to do is see your nature.
Your nature is the Buddha.