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Why makes organisms reproduce?
I don't mean to linger on the philosophical point of this question but more on the biology of it.
In species other than humans and a few others, sexual reproduction is not something done for pleasure so why do other species do it? It provides no benefit for that particular organism. Many people have answered that it's just a passed down trait or it has to do with genetics. I don't understand how a habit can be passed down through genetics. This isn't something like the need for an organism to feed itself, because in that situation, the organism would die otherwise. With sexual reproduction, there is no benefit (that I can see) for the organism.
Which leads me to another question: why do females (of species other than humans, once again) find males with better reproduction rates, more 'attractive' (as I have learned in my biology class). It doesn't mean higher survival rate, so once again, how would that organism be affected and how does it make that decision?