'Cellulite' is an invention of the cosmetics industry, nothing more. A far more accurate name would be 'female-pattern adipose tissue', but no-one would believe you could 'cure' that with lotions and potions!
The easiest way to explain why women have the bumpy fat known as 'cellulite' and men don't is this:
You skin is held in shape by a 'web' of connective tissue - in women, the web is quite loosely woven, rather like the net you buy oranges im, whilst in men the net is tighter. Your fat cells (we all have them, no matter how slim we might be!) are like bags of semi-set jelly, whilst men's fat cells are smaller and denser (prod and beer-gut and you'll see what I mean about dense fat!). So, put soft female fat cells in a net bag, and they bulge through - 'cellulite'!!
It gets more common/pronounced with age as the connective tissue web slackens (also the cause of wrinkles and 'saggy bits'!), and obviously it's more pronounced in those of us with bigger fat cells!!
Whilist a cream may temporarily tighten the connective tissue (like an anti-wrinkle cream does), it can't make a permanent difference, nor can a cream change the underlying fat cells (if only!).
That said, if you find a cream that YOU think makes a difference, and makes YOU feel good, it's worth its weight in gold and of course you should use it. But use it because YOU want to, not because the advertising hype says you should.