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 == The word ""penetration"" == 

 Good evening, RTG. I saw your edit here, and have been wondering why you consider using the word in that sentence immature? You haven't been reverted on it, but ""penetration"" is okay to use when talking about sexual acts. It's in a lot of the sources and there are sometimes when we need to say ""vaginal penetration,"" ""anal penetration,"" etc.   "