Are you a grunter when you cum?

Always been fairly subdued in my orgasms and when I do make an audible exclamation, the vast majority of the time it is just a grunt or two. In fact, my wife has always told me the sound when I come and when I sometimes push out the last rep during heavy lifting are indistinguishable, so I guess a grunt for either act is a sign of an effort achieved.
 
With me, when I feel a bit of stirring going on and I know I'm not far, it's usually a don't stop now (BJ) and once I know I'm past the point of no return I let them know I'm gonna cum....don't stop!! As I'm about to cum I push my cock as deep as I can that is comfortable to the giver and let out some moans etc., along with a different breathing pattern. I love when they get hungrier knowing I'm about to lose my load!
 
What kind of tricks do you use to “tone it down”?

do you purposefully groan (because it makes the experience better)? Or is it natural and you have to try hard to suppress it?
Making noise is natural. I don't force it to impress anybody. Sometimes there's a reason to be discrete, like when the kids are around the house or when I'm jacking in a stall somewhere. Then I use breath control or bite my lip.