Cluster B?

[alwysfishin85]

This site has changed my life in every aspect and getting gorgeous women is just one part of it. Was dating this chica for almost 3 years....baggage was an understatement!! Free'd myself and somehow found this site. Realized all the same things you guys know as basics now and describe myself as a ****y nice guy. (Probably doesn't hurt I treat my body like a shrine, crossfit 6 days a week, and a firefighter/paramedic.). Ok no more bragging for now, just a quick question...what does cluster B mean?