Wow, this sounds like a great way to get screwed over by a former, disgruntled ex-partner. Partner wants you to choke them a bit during sex, you know (or don't know) it's illegal, but think "eh, it's fine, what we do in the privacy of our own bedroom is our business, and $PARTNER really likes it". Fast-forward to an acrimonious breakup, and your former partner is now accusing you of an illegal act.
I 100% get that domestic violence is a real thing, and even aside from that, there are some things that we do try protect people from, even if they consent to it, but I feel like this crosses the line.