I hate to use my fingers. I usually use things I find around the house, things that have curved ends.
First I get very wet by looking at video and pictures of a woman giving birth. There is something about women in labor that I find incredibly sensual. I start massaging my clit. I usually also like to massage my g-spot at the same time. I instantly get the sensation to bear down. The same feeling of birthing a baby. I have to push down and hold my breath. I am then able to push out all this cum and I have an amazing orgasm.