Do you act different when youre alone vs when youre with your partner?

I know everyone does weird things when theyre alone, pick their nose make weird faces, FART. With my ex it took until i gave birth for me to act like this, because i mean he saw my vagina gushing blood and he saw everything and all my flaws. With my boyfriend, weve been dating over a year, and i want to get to the point i can act super goofy and weird around him. Dont get me wrong, we do act like foods together. But i dont want to be afraid to do anything around him