The Horseless Rider is a solo sex position the targets the vulva.
It's especially good for those who enjoy broad stimulation between the thighs. People with very sensitive clitorises who don't like the feel of direct contact targeted at their clit may like the feeling of this position.
All you need for this position is a pillow and a sex toy . Slip the vibrator into your underwear and secure it in the way that works best for you (like with bondage rope). Then, bunch the pillow up to make a ridge and position a leg on either side. In your straddling position, you can rub your vulva or penis against the mound of the pillow. Experiment with slow sexy figure eights with your hips or hard and fast thrusts. There are plenty of patterns to try out alongside your vibe for even more variation.