I’ve read before that the female orgasim could be compared to men having niples. Both males and females have them. But they are only anatomically, and physiologically “used” on the female body. (If she has offspring of course. )
@cazzie is also correct. It can improve chances of impregnation.
Most other “meanings” for female orgasims are subjective, and based on our social behavior. For instance, a female is more likely to have an orgasim if she is attracted physically to the male (or in biological terms, attracted to his DNA,which should provide a better offspring. ) So. The fickle female orgasim is a “test” of sorts, that helps the mating selection,or choice of a partner.
My ex was married before she was with me,to her high school /only lover. She told me that she only had like 3 orgasims in her life before me. It was remarkable, to me,that I seemed to know more about her body than her… To keep this tasteful, I’ll simply say that it was no longer an issue for her… And something that I enjoyed helping her with. It was her ignorance of her own anatomy, not an anatomical “problem” from mother nature.
As far as animals go, some seem to enjoy it more than others. But their instinct keeps the drive going.
As mentioned above dolphins are a good example. Their families will give “genital rubs,“as a sign of affection (yeah gross,but I didn’t design nature.) So,we can draw the conclusion that at least some animals use their sex organs for more than procreation.
Some animals even “use” recreational drugs. Some monkeys seek out certain poisonous centipedes, because when they lick them,the poison causes a hallucinagenic effect and euphoria. Others know fermented berries get them drunk.
I think sex feels good for most female animals. Regardless of whether they appear to be enjoying it,or not.