Why are humans the only species that require consent?

A thought occurred to me today: Animals don't require consent. Dogs can have sex with any dog they want to, cats can have sex with any cat to, etc. No animal requires consent to have sex except for humans. Why are humans the only animals that require consent? Why don't dogs, cats, fish, birds, etc.... show more A thought occurred to me today:

Animals don't require consent. Dogs can have sex with any dog they want to, cats can have sex with any cat to, etc. No animal requires consent to have sex except for humans.

Why are humans the only animals that require consent? Why don't dogs, cats, fish, birds, etc. require consent?
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