How far is too far?

while I was attending a workshop on bdsm, there was a class called " how far is to far" which is fairly bland, but I went anyway. the class was all about where you draw the line when it comes to sex and consent. for some people they draw the line at monogamy, some draw the line at cnc, that's when things got interesting for me, they started asking people what kind of things are off limits, they had all the basics, and each person started saying what they thought their line is. it was amazing the ammount of people that shouted out something you would never expect. ( mine can't be said here for reasons) After the discussion was done i had a few people come up to me and thank me for being honest, it gave them the opening to say their own limits. and they opened up about why, and what happened to them. I can tell you I loved hearing about their stories and it gave them an outlet to vent with out being judged. just another little glimpse of the other side of the spectrum.