For most people, if their partner cheated on them with another person they would feel devastated. But is there any evidence that this is biologically innate behaviour or if it is a socially learned behaviour. As in, society says that partners are not supposed to cheat.
You often hear about hippie communes and suchlike where people share there partners more. But then again you hear that sometimes these fail because of innate human jealousy.
And there are some societies that are polygamous or polyandrous and they don't seem to have these problems.
Also, the way a human can find out about cheating is through communication by language. There is no analog of this in the animal kingdom which makes it slightly different. Although language could conjure up an image which would be similar to what a lesser animal might react to.