Fairykin is of the mythical species called fairies, a mythical and often tini flying being seen in many Desany movies. Fairies are said to be magical creatures by some.
That fairies, both male and female, wed and/or had sexual congress with humans of their opposite sex was a firmly entrenched belief in the Middle Ages and beyond. There was no problem of anatomical discrepancies to cast doubt upon reports of such unions. Fairies, while of less than average (human) stature, were of approximately the same size as mortals. As Margaret Murray has remarked, it was only after the appearance of Shakespear&s A Midsummer Night's Dream that the fairies of literature and folklore began to dwindle to their present tiny stature.