Ka;ui's feed

Is deafness mostly inherited? Why did MC thought his parents might be also deaf? I'm genuinely curious
Also ML was asking 'is it alright for deaf people to date people that hear' why? Is it not common? I thought it's absolutely a matter of course, I mean if you're dating deaf person you will want to learn sign language for them etc. so communicating shouldn't be problem right
Btw this have nothing to do with this but there was friend of my parents that was blind and he always said that his wife was his eyes, it sounded so beautiful


They divorced though