In case of frogs fertilization is external,then why do they mate?

Answer 1

The mating is frog is called amplexus.Spermatophores are not discharged inside the body of the female.The purpose of mating is to synchronize the release of eggs and spermatophores so as to maximize the fertilization in water.

Answer 2

Frogs are oviparous (organisms that lay eggs outside their bodies). It doesn't mean that if an organism fertilizes its egg externally then it can just get away having intercourse. Of course not. Everything needs to produce sexually (having a mate and doing the thing) except for plants and unicellular organisms such as bacteria that produces asexually (no need for a mate)

Answer 3

Mating does not nec. mean "intercourse"; when frogs mate the female simply lays the eggs as the male is fertilizing them- well, in most species that I know of, anyway.

Answer 4

Since you ask about frogs, I'll tell you a fact about frogs that you have never heard before. Did you know that frogs hear with their legs?

Shout "jump" at a frog and he jumps. Cut off his legs and shout "jump" at him. He doesn't hear you any more because you cut off his legs, so he won't do what you told him to.