Mario the Space Cadet 

He's at it again or is it a task?....

Probably just more attention/airtime-grabbing.
Hell hath no fury like a little goblin scorned..

What's he doing now?

Didn`t see it suzy but Olly`s LUTed it. Go to the last page.

Sounds like very strange behaviour.

oooo just seen, cheers scotty 

Naah!  He's just larking around because it's Big Brother.
As for his relationship with Ben - that's just the way it is now.
It's a bit like "can't live with him, yet can't live without him."

I wouldn't call sulking in the toilets for hours on end and walking round with a face like a bowl of sour milk especially 'larky'
And I sure as hell wouldn't rush to stay friends with someone who kept making snide remarks to/about me.

They nearly all do it though in Big Brother.

An example on the BBnews page today -
- Dave and Ben bitching talking about John James and Josie and how their relationship has affected others.
Then it says:
"Ben appears to have been a little bit hypocritical as after he left the nest he went straight and told Mario that he mustn't talk badly of people - adding 'I don't bitch about people'."
6 of one and half a dozen of the other.
I think the Mario/Ben relationship has been like this for some weeks now.
Fascinating really. (At least to me.)  I find it one of the more interesting dynamics in the house. I think they both understand each other, and share a similar degree of "love/dislike".  
As far as "Big Brother behaviour" goes it seems mild to me.