The male is usually a monster physically, capable of great rage and destruction. The female is kind, smart, and emotional. She brings out the best in him. She sees the good; he smashes anything that threatens her into itty-bitty pieces. The 'beast' is almost always a man, though there may be exceptions. The ideal is often so high that sexual relations are not mentioned (Not by the creators, at least). If physical relations do occur -- if it's even possible -- expect doom, unless some magic (like the power of True Love's Kiss) occurs to turn the male into a less objectionable form.