Does Tsubasa Reservoir Chronicles have Yaoi in it?

My friend is currently watching this Anime and says she's happy because 'there's a canon Yaoi couple in it'. She's a HUGE Yaoi fangirl-like me-, so I don't know if it's actually true. Heck, she could call Sasuke and Naruto canon since they kissed xD So to anyone who's watched it: Does it actually contain canon yaoi, oder is it a fanbase thing?