How did Sirius Lure Severus into the Whomping Willow?

[mhbobbin]

No: HPFGUIDX 105915

Kneasy:
> I see Sevvy as a vengeful type - he'd want his pound of flesh, tosee
> his enemies humiliated. 


mhbobbin writes:

Related to the attempt on Severus' life ---
One of the ongoing mysteries is how / when did James become Head 
Boy, when we know he was not a Prefect in his fifth year. Remus was 
made Prefect, he believed, in order to keep his friends James and 
Sirius in line. By his account in OOTP, he failed miserably.  We 
don't know all the details of the Hogwarts Prefect system but it 
doesn't make sense to be passed over for Prefect only to be chosen 
as Head Boy.

I'm just wondering if James became Head Boy because he rescued 
Snape? And perhaps because Remus was removed as Prefect. Not 
necessarily because of anything he had done--perhaps it just wasn't 
political to keep him as Prefect after this episode.

I think that these two events--the Whomping Willow episode and James 
becoming Head Boy--may be related.

mhbobbin