Why is there a yaoi category in the group section of Hatena Blog

I just started a new series called Haiku Mystery Dungeon: Explorers of Keywords. You can find all 3 chapters right now at: http://h.hatena.com/target?word=Haikrew%20Mystery%20Dungeon%3A%20Explorers%20of%20Keywords

Why did Mary fell down the tree? Cause she doesn't have any arms Knock knock. Who's there? Clearly not Mary

Hello to anyone and everyone who may be reading this.