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
Twitter 上的Michelle Oakley:"Who knows what this is & what species it belongs to-- is it normal? Brain #TicklerTuesday 🤓#yukonvet #wildernessvet https://t.co/CqvtVuhRpw" / Twitter
Veterinary Anatomy World - Guess what is it? . . . Cat's penis with characteristic penile spines. Upon withdrawal of a cat's penis, the spines rake the walls of the female's vagina,
Why Is a Male Cat's Penis Barbed – Pierre-Ecohealth Blog Posts
Why Human Penises Lost Their Spines
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Penile spines of the domestic cat: Their endocrine-behavior relations
Why Is a Male Cat's Penis Barbed? | Pets - The Nest
Why Do Cats Have Barbed Penises? (According to Science) | Hepper
Barbs on intact male cat's penis : r/interestingasfuck