Question about mares

[Cherokee2789]

Question about mares
Hi, I am new (latino) and this is my first post.
I was recently watching some videos of mares and it struck me that they can kind of "palpitate" their vagina. Anyone who can educate me on this? haha I'm very inexperienced.
Is it an orgasm?

 

[pes]

It is called winking. It is a sign of estrus and a part of mating and courtship behavior.

 

[Longrider176988]

It means she likes you. I've seen them bear down and wink and it looked like they turned that thing inside out!

 

[lover of mares n' fillies]

Normal sexual behaviour for mares is that they receive males only when they are in heat. Lifting the tail and winking is sign of her preparedness.
However, some (few) mares can be fucked year around, and then winking seems to express sexual pleasure.