With how common and popular female sex toys modeled after animal and fantasy creature penises, tongues etc. are this just makes sense. And having known some horse girls in my life, yeah, I'd not be surprised at all to learn many have fantasies like that. I always found the "horse/dragon/tentacle etc. dildo" thing pretty fucked up, I'm sure many of those people (and people in general) would not like it if they heard about "horse/dragon/whatever fleshlight or sexdoll for men". (Never seen or heard about that existing, but I'm sure it does).