Pulsars

contrary to popular belief i think pulsars are not a light flashing on and off every other second. i believe something is rotating around it fast enough to seem like it is blinking, blocking the star as the dark mass rotates around the star. if it were the end of its life by super nova terms i don't think it would pulsate. can we see the light on either end while looking at it? no. so how can they be so sure that it is pulsating? these dark stars are simply rotating around the bright stars. sounds too simple im sure