I have seen multiple girls offer a "dragon tendon" massage and I am curious as to whether I should try and if it's worth it.

My friend has spoken about it and the orgasm he has had from it but that's only one person I know who has done it.

I have attempted it once but I just could not relax and was clenched up and honestly it was giving me the urge to shit.

My question is should I take the plunge and what are some tips to go with the "flow", also I noticed there is a warning for people with heart conditions to not to do it????

Any experiences to share?