Sorry, let me start again.
According to wiki, there are 23 titles with the AO. 3 of them don't really count, 1 was pulled before release and 2 were on non-gaming systems, DVD and CD-i. Thus were probably interactive movies. So it leaves twenty titles and the PC version of Manhunt 2 was the only one I recognized, aside from Indigo Prophecy and Leisure Suit Larry: Magna Cum Laude, which were only AO as director's cuts. I've never seen any of these AO titles on a store shelf other than Manhunt 2, which was only stocked in "M" rated console form.
So what is the problem here? How can kids get they're hands on AO games, when distributors don't even stock them?