What is "the bean" (sheath cleaning)?

i saw a question about sheath cleaning before, and people keep talking about "getting the bean" i figure that its like old dirt and smegma etc that is in a little ball? also how often should you clean their sheath? is smegma discharge from the penis or just oil/dirt? i have a mare so ive never had... show more i saw a question about sheath cleaning before, and people keep talking about "getting the bean"
i figure that its like old dirt and smegma etc that is in a little ball?
also how often should you clean their sheath?
is smegma discharge from the penis or just oil/dirt?

i have a mare so ive never had to worry about it, and i recently was given a gelding but hes really clean (he must have been cleaned just before i got him) except my friends horse, i noticed the other day, really really needs a clean except shes your typical scardy "ew gross a penis" 13 year old so ill probly have to help/do most of it for her so i figured i should clue myself in on all this cleaning stuff haha
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