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[–]Fastandthecurious[S] 1 insightful - 5 fun1 insightful - 4 fun2 insightful - 5 fun -  (0 children)

No, I'm not saying the different methods become the same. I'm saying sperm and egg are different because they are the only ones that can fuse and create a zygote. If it were the case that two sperm or two eggs could fuse and create a zygote too, then it would mean the differences between an egg and a sperm are arbitrary and could as easily occur between two sperm or two eggs.

Comparing sperm and egg, to man-made things like roads, and motorcycles isn't a good comparison. Whatever differences exist between motorcycles, cars, roads, etc are man-made and could as easily exist between two roads, two motorcycles, two cars, or whatever.