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Nah that movie was about how human men are biologically flawed and that our cock and balls should be internal in some kind of clam shell like thing.
Happy reptile noises.
For whatever reason sperm cells just come out better when kept a couple degrees colder, though, so here we are with our insides out.
Yeah its the prime example that evolution isn't perfect just happy with good enough.
Also a great detriment to the "grand design"
It also illustrates a funny bit of the logic of multicellular non-clonal creatures: the germ line is the species. The other 99.9...% of you is just a fancy delivery mechanism, so it makes sense to add something seemingly super impractical to the anatomy if it slightly helps the sex cells.