You will find plenty of (forced) Mental AR, mostly on men, among Bfboy's stories. He's definitely one of the best, in my opinion the
best when it comes to Mental Regression.
There are far too many AR stories out there for me to remember, but you will find the theme of adult men getting mentally regressed by their partners on his story page! ^^http://www.ararchive.com/index.php?option=com_ewriting&Itemid=7&func=authorstories&userid=2970