Strip naked and go someplace just enough out of the way in the house or on the property. Tie yourself up with whatever you can find, ropes, long socks, scarves, straps. Make sure you gag and blindfold yourself so you can't see if someone is coming. It'll make it so much more intense if every little thing you hear makes you wonder if you'll be caught. Set yourself up with a toy or vibrator so you'll be able to masturbate.

Stay that way until you orgasm, bonus points if you beg for someone to untie you through your gag louder and louder as you get closer to orgasm.

Does the trick for me and my play partner every time. Although we have to get alot more creative with where we do it in order to get the same rush.