If I'm in a particular sexual scenario where I want to highlight my masculinity, or if I'm feeling awkward about my chest, yes. I try not to make a habit of it, though, because I get really sweaty when I have sex and it isn't comfortable at all.
On days I really don't like my chest, I leave my binder on during sex. Or sometimes I leave it on because my girlfriend likes it when I have a flat chest. (She got to know me when I was presenting very butch and flat chested, so she prefers that to when I don't bind.)
But sometimes it's just way too hot to have sex with the binder on, and sometimes I don't like the distraction of it digging into my shoulders. Also, on days that I don't mind my chest, there is something incredibly intimate about allowing my girlfriend to touch my chest. It isn't really about the physical sensation, but just baring that part of me and having her be tender with it sometimes means more to me than a hundred orgasms.
I love playing with gender in a lot of different ways when I'm having sex. Sometimes this translates into me binding and sometimes it doesn't. A lot of it has to do with how masculine I'm feeling, which shifts from day to day.
It depends on how I am feeling. I used to always bind. I have always been with the same partner, so that helps make a difference. I have had to bind less often as of late because I have grown pec muscles with T. Sometimes I will keep a shirt on for my own comfort. And positions make a difference.