I don't understand how horses (馬) appertain to deceiving and swindling (騙). I'm uneducated on horses. Is there evidence that horses swindle humans or other horses?
And I don't understand how the meanings underlined in red below (leap into a saddle, mount a horse) to deceiving and swindling either.
Above is Yellowbridge. Below is Oxford Chinese Dictionary (2010) p 553.