On the Ruby Ryder’s forum someone wrote that they had used their partner’s Lelo Sona directly on their unlubed anus, and that they got several minutes of bliss from it. I tried it out and it was pretty fun. It is not something I would do every day, because it is very mechanical. But I enjoyed it. The sensations penetrate surprisingly far for an exterior toy. Maybe it is just as good with any vibrator, I have yet to try other ones out. Or maybe it is particular to these suction vibrators... in any case it is worth a try if your partner has a sona, and if she is willing to let you put it on your hopefully very clean butt. If you don’t have it, I wouldn’t say it is worth spending money on it just to try it out, unless you have a female partner to give it to—clitoral women love these toys!