How do i show my bff (male) that I am strong with out hurting him?

I took 15 yrs of mixed martial arts, 5 years of boxing, 5 of wrestling, 10 of self defense. My bf says he can take me because I am a girll.... I want to show him I can kick his *** with my fking pinky finger... without hurting him...
Update: He is not sexist! He says it is purely biology. (It is). But he took nothing... and I am a hard core badass..
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