There are very many 'Adam & Eve' stones in County Wicklow. They are definitely male/female.

http://homepage.ntlworld.com/tom.fourwinds/boherboy/boherboy.htm

There is another pair very close to the above ones, that the locals actually call The Adam And Eve Stones. Funnily, they call the tall thin one Eve and the squat one Adam!!

This is also a male/female pairing, but I think there may have been more here at one time.

http://homepage.ntlworld.com/tom.fourwinds/moneystown/moneystown.htm