I'm new to this, having just been diagnosed with ASD two days ago, but I just had a funny experience about ten minutes ago regarding this.
A guy I work with was talking to me and another guy and said "hey, remember that time when you had just joined the team a few months back and Kenny was telling you about something he did on his trip to Africa and you just told him right to his face how stupid he was?!" I replied, yeah I remember that... I have a condition that makes me say blunt things to people faces. They laughed; they don't know about the diagnosis.
Then the other guy tells me "yeah, you have a dry sarcastic sense of humor, your face is really tough to read." So I reply "yeah, my condition prevents my face from displaying any emotion." I'm joking with them, they have no idea.
(I hope it doesn't offend anyone on here that I took this approach with it, but it's just my nature to have fun with things.)