What to do when dementia person starts to have a over-sexual interest without being able to adequately perform?

Best wishes, Margaret. Enough sex is important, too much is a trial! I am sure that you know about providing lots of physical contact without any stress about it leading to orgasm. It just may not be all that easy with dementia.

This question has been asked before. Put "Dementia and sex" in the search and the previous postings will come up. Looks like you aren't alone.