New suggestions for self-bondage

Eager to learn more. I’m looking for some suggestions on self-bondage. I am a man and wish to experience something done to me that a woman might do, creating pain or discomfort. I want the ability to inflict this pain or discomfort upon myself while concealing it. My goal is to wear regular clothes that hide what is happening beneath them, allowing me to endure painful pleasure during my daily routine without drawing attention. I hope that makes sense. I welcome all suggestions, so please share your thoughts freely.