Ah, " you sighed. The vibrations of the heart intensified, sending short waves of pleasure through you. You couldn't hold back any longer, letting out soft 'oh's. Mettaton's head lowered, bending over take you in. You stopped looking at this point. All you know is you could feel his teeth scraping along your other thigh, both the heart and his mouth creeping their way towards your privates. The heart reached there first, the vibrations sending you into twisting convulsions of pleasure. Your moans grew in volume and frequency. You arched your hips, stimulating a moan from Mettaton as well.