Maybe it was the fact that you rarely talk to anyone outside of your other doctorate friends and advisors, or the fact that you just had a committee meeting where you explained your current new work to a new committee member, you began explaining your current cryptography work almost in proof form.
You had to make some assumptions so you didn’t have to explain every single corollary and previous research advance but if you did that, it could take all night. It wasn’t that necessary. It certainly would probably be easier if you had a white board or some aids but you knew the math forwards and backwards and could express all of the key points from heart
After about twenty minutes, you notice a blank stare creep onto all of your family’s faces, you can’t tell if they’re understanding what you’re talking about, if they’re using all their mental capacity to follow, or if they’re blanking out and just waiting for you to quit talking.
What do you do?
Keep explaining in greater detail!