I, Personally, always lived by the rules: 1.)Do not stick things up you ass that does not have a good flange or a handle on the end that can be held on to very well.
2.)When you go to the Emergency Room. Tell the medical staff the truth. We are all smart enough to know that you did not really slip in the shower and fall directly onto that long necked bottle of after shave lotion.
3.) When you have a long vibrator that contains 4 AA batteries in your rectum, and the doc asks what happened to get it stuck there, he is asking a serious question and your answer of "I don't know, it wasn't there last night when I went to bed" is an answer that NOBODY will believe. Once again, be honest. Go out and actually buy a good butt plug for your anal play. Lots of people do it including the staff that are hysterically laughing because you actually believe that they accept that explanation. Buying butt plugs or a big dildo for playing with in your bottom is a lot less embarrassing than your trip to the emergency room.
4.) Do not put living creatures in the urethra to see if they will make it to you bladder for the sake of "wanting to see how it feels when they move around", is just wrong on a lot of levels, and is kind of icky. Just saying, stick to the sounds, it is a little saferl.
Join groups of people that share your kinks....they are abundant and you may actually get over your fear of openly admitting that you have kinks, and have fun! Remember, there is always someone that is much kinkier than you are. Rant is now over..