system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Orgasms, how do they work and why do we even have them?

After Googling for a good 2 minutes, I decided to post this here. As stated earlier, what is the point of having one? Do other animals have orgasms as big as ours?
gpt
From an evolutionary standpoint, a woman is more likely to have an orgasm when the man is caring, attentive, reliable (has sex with her often), physically fit (able to produce healthy offspring and protect her from danger), etc. All these are qualities that would make him more likely to be a good father figure. An orgasm is probably nature's most obvious incentive for choosing a mate wisely.

For a male, parenting investments are often significantly lower so orgasms are a quick reward for behavior that is likely to increase the total number of his offspring.

From a creationist standpoint (if you're so inclined), orgasm is an obvious bonding experience that would be likely to encourage long term relationships (a recurring trend in religion).