Re: Very Strange Dream
there are two sides to martial arts:
a) either you are on the defensive, or
b) on the offensive.
have you felt unsafe in any part of your life lately? or felt aggression or on the offense? possibly by your mother's passing (even if not related to your mother specifically as a person as you were not close, this person was in the mother role so obviously you're stil going to grieve, even if only for the mother you never had.)
so you're in a place that feels comfortable (from your description) and safe.
There's a task that you have to do, and while the distance itself isn't very long, it's something that you can only
inch across with a nearly invisible effort, but one that is intense and sometimes uncomfortable.
personally, this would signal grieving for me. Especially if your mother had signed you up for the class. Perhaps you aren't grieving because you didn't feel like you had a connection, or you feel you don't have a right to grieve for a mother figure because you're focusing too much on not really missing your actual mother.
As for the nudity, in dreams it seems that it's either signalling shame or fear or it's freedom. I didn't get any of the first feelings from your description, but that part where you said, "after you knew how to do it, you were supposed to do it nude"
For me, this signals that there are several stages to grief. One that you do clothed/unfreely, and it is a slow almost impossible process that is all inward, and eventually it is one that you do more easily and with more freedom but there will still be very personal "snags" even when grieving is old hat to you.
There could also be something to your instructor being a man, and having a huge member-- perhaps this is your alter ego-- the one who WOULD grieve your mother, signaled by having something that would snag and be uncomfortable. You, as a woman, don't have that part, and as a person who didn't have a mother you would really grieve, you are likewise missing a part-- a rather huge, well-endowed part, that is natural and about which you have lots of curiosity because you never had it.
Or the instructor/penis thing could be something else but I feel pretty firmly about my interpretation of the rest of it.