David Hume

“ One, who is inflam'd with lust, feels at least a momentary kindness towards the object of it, and at the same time fancies her more beautiful than ordinary; as there are many, who begin with kindness and esteem for the wit and merit of the person, and advance from that to the other passions. But the most common species of love is that which first arises from beauty, and afterwards diffuses itself into kindness and into the bodily appetite. Kindness or esteem, and the appetite to generation, are too remote to unite easily together. The one is, perhaps, the most refin'd passion of the soul ”

“ It has certain organs naturally fitted to produce a passion; that passion, when produc'd, naturally tums the view to a certain object. But this not being sufficient to produce the passion, there is requir'd some other emotion, which by a double relation of impressions and ideas may set these principles in action, and bestow on them their first impulse. This situation is still more remarkable with regard to the appetite of generation. Sex is not only the object, but also the cause of the appetite. We not only turn our view to it, when actuated by that appetite ”

“ Now 'tis plain that beauty has the first effect, and deformity the second: Which is the reason why the former gives us a keener appetite for our victuals, and the latter is sufficient to disgust us at the most savoury dish, that cookery has invented. All this is easily applicable to the appetite for generation. ”