The idea is that pigs sweat a lot;they may or may not, but that's the expression.
这个想法是猪出汗很多; 他们可能会也可能不会,但这就是表达方式。
科学世界
I mean you will never catch me doing that. But, I have seen you sweating. Well, I guess so. Ever seen a pig do that? Have I seen a pig sweat? Well, I guess not. But what's your point?