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If I see it right, the most visualization programming problem with squirting is, if something / someone is in the way (during the act, other person is near, so cum on the skin must be shown, ...).
So a small effort change would be to enable squirting for the woman at standing doggy-Style position during anal sex (I think, there is space enough) (I don't know exactly, if it's possible yet, but I don't think so, otherwise forget it).
I think that would be really nice.