Behold, a way to climax in just about every room of the house. You'll never look at a toothbrush the same way again.
If you need a vibrator to have an orgasm, but don't think you have one, oh, you do, sister. Press an electric toothbrush, a rechargeable face cleansing brush, or, of course, a back massager into service as your DIY sexual slave. Be safe, of course: Keep real electrical stuff away from sink, avoid anything with a blade or razor, etc... Sit your ass on the sink, spread your legs and wield your new lovah between your legs as your man stands and pumps away. Take advantage of mirrors and one or both of you can watch what's going down.
2. Washer or dryer
Hop up on your washer or dryer, lying face down over the top, angling yourself on an edge so the vibrations are hitting you where you need them. The dryer is better for warmth and a steady vibe, and the washer spin cycle gives more of a crazy-ass wild ride. Put a towel down over the top for comfiness or go commando for a metallic feel with more intensity. Bt the way, you can enjoy the love of a washer/dryer solo too. Just don't do it at the laundromat and you should be good.
Just like Mr. Grey, like seriously! Have your (willing) victim lie on his back and ready for some beginner BDSM. You can blindfold him with a scarf or tights and tie him up with neckties, belts or again, scarves or tights. Try tying his arms together over his head and his ankles together. Once secured and ready to submit to your whims, you can turn spatulas or wooden spoons into paddles and clothes pins or chip bag clips into nipple clamps. Once you are feeling it, slide on top of him and use him like the delightful sex toy that his is.