How much self-gratification is normal?

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Please keep this discussion as clean as possible. I'm only looking for opinions on how much self-gratification the average person finds to be normal. Some, I expect will be rather loose or hedonistic with their responses, and some will be Puritanical and prudent. Some may even say this is disgusting. This is scientific curiosity, and I'm looking for explicit details, techniques, et cetera. Just how often do you think is normal, and do you have a partner as well, that adds a little more depth to the question. Do you ever feel regret or shame during or afterward? Let's hear your responses.