I was reading about Trypophobia and reached to Surinam Toad's reproduction methods. Then I had this doubt- Why would animals want to reproduce so much? In case of humans we mostly have the offsprings nearby for entire life, so some of them may take care of us. But in case of many other animals after birth they have no connection with their parents.
So why do they always try to reproduce in large quantities in entire life time? What they achieve in this?