a problem my wife and i had at the beginning of our relationship (solved very quickly, since we talked about it) is that i expected her to be able to intuitively read my body language. because the sign language i use is, for people who don't sign, basically all body language and facial expressions (for people who do sign, there are no actual signs it's all classifiers) and if you aren't constantly reading body language, you won't understand someone. it took an in-depth conversation about linguistics (a really fun one where we compared the four different sign languages the two of us use), but we managed to figure everything out.