Is it normal that i do get turned on by moaning more than anything?

Ok so normally i don't get turned on by the sexual act i enjoy it but it doesn't make me horny as much as if i hear my horny BF moaning this makes me REALLY excited and what makes me horny before the sexual intercourse is also his voice you know when it gets more intense and deeper. I've noticed the same with porn i don't feel any kind of sexual tensions with the whole action until i hear the male actor screaming and then I'm already orgasmic even if i didn't touch myself for a long time before, sometimes i do watch porn only for the voices without the need to look at the screen. is it normal?