Have you tried shotacon that isn't smuty, but is still shounen ai, like mahou shounen majorian?
I've read some where the kid has 15 years but it has a story with no less than 5 chapters and the kid doesn't look like a sex addict.
Virgin Star (i think that it's the title of the manga)
That isn't shotacon though.
The one I mentioned is, and has no sex at all, and its still boy love and cute and adorable.
http://www.mangago.me/read-manga/mahou_shounen_majorian/
Oops, forgot to add a name, the post I'm quoting is mine.
I've tried and now I can say that shota isn't my thing, it's not hot or sexy or cute and the plot is absurd...
It's my opinion and i don't want to start a war, sorry.