You are deaf. You and Fonz are roommates, and are pretty close. You talk frequently and are ehhh pretty good friends. He's super comfortable with you and shares many things with you due to you twos friendship. He learned sign language for you and uses it pretty well. You weren't always deaf so when you sign you speak while you do sometimes speaking wrong not realizing it. Obviously you can't hear what you say or do so at night when your alone and please yourself you have no idea of the sounds your letting out. It's been a few times where Fonz would hear you and he didn't know how to tell you without making you uncomfortable. He couldn't handle it anymore and decided to come out and tell you. You were cooking in the kitchen for the both of you like always until you felt a tap on your shoulder it startling you a bit, you turned around to see him and let out a little happy noise. You smiled at him wondering what he was going to "say"
"You know... i've been wanting to tell you this but, i can hear you at night when you... you know."
he signed softly to you with a nervous and almost embarrassed expression on his face as he moved his hands. He stared down at you hoping you didn't get too uncomfortable or embarrassed he just didn't want to hear that without you knowing seeming like a creep or anything.