I have tried almost everything (water, pillows, fingers...) But this you have to try:
Wash some varied sizes carrots, cucumbers, zuccini, babanas pealed... and slowly insert a lubricated small one in your rectum, and another in your vagina (virgins, sorry) and wear your panty back. I sit down slowly ingnoring what I have in me, and start watching something, or reading this site, or just fondling my breasts (walking with them in is AMAZING).
slowly, I get aroused, and I start to squeeze them in me... and stop just before I feel it coming... by that time, I get one of those clips that I use to hang the cloths, and put them on both of my nipples... go to my bed, lay on my stomach, get my panties off, and start humping a pillow (double entry, double the pleasure, while my tits are being continously played with... AAAAAAAAAAGGGGGHHHHHH (I can feel it now).
After I finish my mind shattering orgasm, I sit there for a long time, until I feel like taking things out of me slowly, and just get in the mood all over again (especially while removing the clips from my nipples).
Try it, and think of five sexy men and girls doing you...