Do you mean being pale? In that case, if you're pasty it shows more flaws and can make you seem more chunky or unattractive.. a good glow is always in, just don't turn yourself orange by over-tanning! (thats not any more attractive than being pasty). Either way, rock what you are!!!
depending on where its placed. it makes the area look fatter but if you wear it as a bikini it'll make your waist look smaller and your boobs and bum bigger wear it as a turtle neck? completely fat looking fucker
White isn't slimming. I'd be great if it we're though lol.