I have a dare you might enjoy
You need a hood or blindfold for this dare. You're going to get entirely naked, insert a vibrator into your pussy, bind another so it presses into your clit hard, and make sure they're both on high. Then, you're going to start a stopwatch and put on the blindfold. You can stop at any time you want, but if it's under an hour you must edge once per minute less you did and when you've completed that you must attempt the dare again adding however many minutes you missed. For example, you might make it 45 minutes the first time, so you have to do 15 edges and then last for 75 minutes. During the time blindfolded you may cum as much as you like, but if you cum during your edges you have to start them over.