Horze is selling a product called filly suspension, which is described as a “butt plug for the fillies who tend to suck in air”.
They also sell a product called male suspension, which they describe as “a stud support”.
WHAT? Are they serious?? I don’t know, maybe stallions do get uncomfortable sometimes with everything down there bouncing around? But has anyone ever ridden a mare and thought “gee, I sure wish I could get a butt plug to stop my mare’s queefing”?? I’m pretty sure the answer is a resounding no! (And yes, I understand the anatomic differences involved in butt plugs versus queefing.)