But the Liberator Jaz mini may've changed my mind. 

It's a bit small for me, to be honest. I have 50" zaftig lady hips, and this cushion is 13 x 15 x 6 inches. It's a little bit of a balancing act. But I really, really like the shape, and I've become convinced that these things are handy after using it. It pretty much perfectly supports the body into positions that inviting present your pink bits, making strap on play, oral sex, and PIV sex that bit more comfy and enjoyable. Using it for oral sex, for example, with the female receiving, presents her pussy in such a way that it makes it more comfortable on her lover's neck, which is good if you like oral sex without a lot of whinging. ;)

This cushion has a soft, velvety, microsuede cover that unzips, and a waterproof liner underneath that also unzips, meaning machine washable. That's pretty nice, and they were easy to remove for cleaning purposes. That's important for me, as I'm a bit of a squirter! The foam is hardcore furniture grade foam, so it can support you (for an idea, I'm about 250lbs, and it supports me just fine). The size is nice, too, as it means you can just tuck it under the bed. Frankly, you could just leave it out, because it's not at all obvious what it is!

My only complaint was that there's a tag on one side that occasionally touched me, and it was pretty scratchy and irritating when it did. If this was just made of satin instead, it would've been perfection! Even so, it's still something I'd recommend highly. It's not just for sex, either! I used it for massage (add a pillow to the top of the head for full support) and also to stretch out my back.