Before I was born my parents had a pair of cats, Henry and Morris. Henry was oldest by a few years, and my mother was certain that when they brought baby Morris home Henry would try to kill him. But just like this Henry he decided it would be a good idea to nurse Morris instead, and so they continued well into Morris’ adulthood...two unrelated adult male cats nursing away.
(I’m sure there’s some DU troll reading this and thinking it must be evidence of some kind of naturally occurring gayness, but really it’s just that cats can be weirdos!)
Bless ‘em all.