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You know what time is it?
ZUBAT TAIME
Requesting a Female Zubat and Male Trainer fic, the dude use his Zubat for his medical treatment (she sucks some blood like a medicinal leech) until the Zubat begin to act more lewd toward him, "fellating" her trainer's fingr, the guy it's pretty ok with it and have in mind a different use for her mouth down there (using her little and cute fangs but only rubbing it, not phlebotomizing it (at least you think our dude is a hardcore one) ), and after that, despite he can't please her for their size differences, he pleases her with his thick fingr. At least you believe in magical ultraflexible slits
Or...
Something sexy involving Bangs (Anthro Female Zubat from the pic) with fellation and pussy penetration. Pic related