Tickling
When I'm having a shower or I've just had one and I feel baby soft and REALLY clean, I like to wander farther down with one hand.
I like tickling and fingering my bum in and out slowly whilst rubbing my clit and fingering my vagina really hard. The combination is a great sensation and I can orgasm over and over again in such a short time. I recommend you try it or let someone else do it to you.