Kadence,
Big hugs and long distance cuddles. 
What happened to you just wasn't right.

Originally Posted by
Kadence
My question is this:
Do you think that, as a community experienced in such kinks and, given that I'm still learning about this lifestyle, it was irresponsible of my master to have me do such a thing?
I must agree with many of the opinions already presented.
He was irresponsible.
You had and have an ongoing responsibility to take care of you.
I, too am curious if this is an online relationship, or if he was there, in real life, watching what happened.
There is a big difference between asking someone to masterbate in a locked car, in parking lot, versus masterbating in an unprotected area.
Likewise, a big difference between masterbating at a play party with like minded people who aren't going to interfere, or out in the open where anything can happen.
In some places, you could have been arrested for the act alone.
I'm very concerned about the judgement of said dom
and that you might be experiencing a bit of sub-frenzy (that overwhelming desire to please that is often the cause of impaired judgement and the inability to say "no").
Both are a dangerous combination.
Please forgive yourself, learn from this and remember the old saying...
Burn me once, shame on you.
Burn me twice, shame on me.
Ruby