From a Male perspective;
Nobody really wants to know what is done behind closed doors. We all have little snippets of what we want to think others do and / or don't do. Guys talk just as much as girls about sexual prowess and practices but, to know all about our deep set kinks and perversions is TMI. The overall opinion of this thread is Don't tell. I have to agree. What may be trust based today can quickly turn to Spite based fuel down the road. Whether light or dark fetishes, hard or soft bondage, fantasies should be held close to the vest (or corset) as it fits. Be safe. have fun. enjoy the I know something you don't know aspect of your life.
If you confide in a third party for safe call purposes; be generic in the who, what, when, where, and why as a safety net for yourself. If they think it is a vanilla thing; whats the harm. Just an opinion...