Jon Jones failed a doping test before UFC 200 this summer because he took an off-brand Cialis pill, he said on the Joe Rogan Experience yesterday. He told Rogan that he has a huge cock, and that he takes male enhancement because it “it puts the twist at the end of a punch” and “it’s a good time” while pantomiming a growing penis.

After Jones failed his test, it was revealed that he tested positive for clomiphene and letrozole. Both are mostly used clinically to treat women (for infertility and breast cancer respectively), and inhibit estrogen production. They sometimes show up in male enhancement pills, especially clomiphene, and are also used after anabolic steroid cycles to raise testosterone levels, which is why they’re banned.

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Jones went on to detail that he got the off-brand Cialis from a teammate whose girlfriend is a pharmacist, and took and used it on June 14, two days before the doping test. Last month USADA arbitrators said that they believed Jones’s explanation, but still suspended him for a year.