Some animals may use their penis bone to scoop out a rival's sperm | New Scientist
Zoe Cormier on Twitter: "The penises of cats bear barbs a millimetre long. "Penile spines" - this years hot trend? #SexDrugs @DaCapoPR http://t.co/eRVeEU3W5i" / Twitter
Normal genitalia of male cat
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