I'm Not The One Holding The Rat I Have No Idea If Your Even Meant To Hold A Rat That Way - Blog Posts

For anyone wondering why rats have such big testicles it is because of two reasons, first one is the fact that bigger balls = more sperm which is because males directly complete with other males and as such want to spread their sperm the most; also I found less sources for this one, but people have said that their rats testicles get bigger in the winter helping them thermoregulate better and 'shrink' in the summer which can cool them down

also for everyone wondering just how big these rats balls are but dont want that shit on your browser history here you go