My current partner's laughs. Yes, plural. He has a different laugh for different things. And when I made him laugh for the first time, a real laugh that ended in a coughing fit and several gulps of water, I knew I was head over heels. He has a polite laugh, an offended laugh, a goofy laugh, a refined laugh . and never at the expense of someone vulnerable. His laugh is perfect, no matter which one it is.