Is there an advantage to having cellulite
There's no advantage or disadvantage (beyond personal perception of attractiveness).

It's a benign condition that can occur with hormone changes, weight changes, and especially genetic predisposition.

It occurs in most women (up to 90% will have it at some point) and some men, and physicians consider it 'normal.'

http://www.mayoclinic.com/health/cellulite/DS00891