Technical Question Tuesday

It's Technical Question Tuesday, where Missy puts something out there that she has no idea how to solve and asks for help. 

Today?  Spam comments.

Why do some posts attract more spam than others?  I have one post - cycles - that keeps attracting spam - which is so strange that it's the only one. 

What is it about a title that attracts spam?  And therefore, how do you title your posts to avoid it?  Or can you?
Can anyone help a girl out today?

Thanks so much.