"The actual lines of a pig (I mean a really fat pig) are among the loveliest and most luxuriant in nature; the pig has the same great cureves, swift and yet heavy, which we see in rushing water and in rolling clouds."
G.K. Chesterton, in his 1920 book The Uses of Diversity
Pigs can get sunburned. Pigs are the only mammals besides humans which can be sunburned. A hippopotamus also can get a sunburn. But, then again, a hippopotamus is related to a pig. Pigs cannot sweat.
Pigs wallow in the mud to protect their skin from insects and sunburn, not because they like to be dirty.
Scientists say that pigs, unlike all other domestic animals, arrive at solutions by thinking them through. Pigs can be and have been taught to accomplish almost any feat a dog can master, and usually in a shorter period of time.
In Northern parts of China it was once a common practice to shave pigs. When the evenings got cold the Chinese would take a pig to bed with them for warmth and found it more comfortable if the pig was clean-shaven.