If you like, take a shower or bath and light a candle, just as you would for a romantic evening. Have a playful, exploratory attitude.
Sometimes you have to catch yourself as you are, so if you want to, you can do this exercise outside in nature, in your car while parked somewhere, or at your desk if you have to.
If you want to do it covertly, just pretend that you are meditating. If there is a particular scent that you like or find erotic, place it on the inside of one rist or at the place where you thumb and forefinger come together. Inhale this scent for a dozen breaths, feeling what happens all over your body as you do so. Inhale through your nose and exhale through your mouth.
With your mouth slightly open, breathe in and notice the tender of the air as it flows over those sensitive nerve endings in your lips. Continue in this way with all attention on your lips.
Play with varying the shape of your lips. You will notice the sensations change with each almost imperceptible shift in the way you shape your lips.
Then let you attention move to the top of your tongue, the roof of your mouth, and the empty space between them. Rest your attention on the stimulation your tongue and roof are receiving.
Next become aware of the back of your throat and the way it receives air. Notice how the air is warmer and moister as it glides up and out that it goes down.
Then become aware of the breath expanding your chest slightly, pushing your breast outward. This is a very subtle sensation. If you want to amplify it, you could wear something silky.
Rest your attention in your belly, feeling it rising and falling, expanding and contracting. Become aware of your pelvis and of the very tiny sensations that are evoked by he motion of your belly just above it. Usually, we do not pay attention to breath in the lower torso.
When you first start noticing, it may be like walking into a dark theater. You can’t see where the seats are. Over several minutes, your senses will adapt and you will start to perceive the rocking motion of breath as it flows. As you pay attention, the sensations will tend to get stronger there.
Be aware of the whole flow of breath downward, from your throat to your chest to your belly on down. Imagine that the breath touches your genital area before turning back and going upward. The let your awareness be global again.
Be aware of your skin all over, and luxuriate in the feeling of being contained within your skin and your aura. You may have a soft tingling sensation in your skin, or sense of being inside an invisible blanket. Sit there for a while, resting in the delicious feelings.