Sorry to her about your experience with a strap on, that's just another example of someone ticking a box on the favourite section and not having a clue what they are doing. I've had 2 "experienced and professional" mistresses ram things up my ass and they didn't give a shit if it hurt or not, one of the experiences left me very sore for about 5-6 days. Not everyone is so rough or inconsiderate so I would advise to try it again but just make sure it with someone who knows what they are doing.