Warlocks, Wizards, and their Wardrobes

[Gwyneth]

No: HPFGUIDX 23670

A simple question, hoping for a simple answer:

What's a Warlock?

What makes a Warlock different from a Wizard?  Because Dumbledore is 
Head Warlock or something-like-that, is he a Warlock?  So can a 
Warlock be a Wizard?  Are all warlocks wizards?  Are all wizards 
warlocks? Can a witch be a warlock?  What is a warlock?

Okay, maybe that was more than A question.  But I'm interested in 
knowing.


A second question, maybe not so simple:

We know that many wizards have trouble with Muggle clothes.  So do 
they wear robes all the time?  Certainly the children don't, they are 
often described as wearing muggle clothes, from Percy pinning his 
prefect badge to a sweater vest, to Ron mistaking dress robes for a 
dress of Ginny's, to the Weasley Christmas Sweaters.  I get the 
impression that all Wizard children wear muggle clothes to Kings' 
Cross Station.  So weren't the adult wizards once kids, do they 
suddenly lose all fashion sense?  And where do the kids learn their 
knowledge of muggle clothes?  And of course, where do they get the 
muggle clothes they do own, and with what money?  Do they often trade 
wizard galleons for muggle pounds?  Am I reading too far into the 
story?  Please, don't answer that last question.


~Gwyneth