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Anonymous File :-(, x)
Most birds appear to have lost their penises, but this does not mean this was the case with dinosaurs. In fact since some birds still have penises, and very long ones in fact, it is more likely that their common ancestor did, too.
Another argument for dinosaurs having penises is that all dinosaurs had those big, stiff tails in the way of mating. The only practical way around that is a long and mobile penis. And if you think the tyrannosaurs in the pic have it hard, try to imagine two stegosaurs going at it...
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