Yes!!! Yes it matters! Wtf? If your too lazy to separate your clothes, your light colored clothing ends up dingy looking, you look like an idiot. I don't have money to keep buying new clothes just because I didn't feel like separating them. I think even someone who has a lot of money would like to hold on to it by not wasting it. That's just me though, call me crazy.
The laundry does not have to be separated before being washed. The most important thing is the end result. If the laundry is clean at the end of the day, there is no problem it was not separated before being washed.
I do not mind washing lights with darks. my only two rules are- 1. I would never wash a white shirt with a brand new Red or Black shirt. 2. As long as the white article of clothing question is not a dress shirt or all white w/high thread count.
Sort of. I don't worry about separating colors usually. When I buy a new dark item I wash it separately or with other dark at least 2 times. What I do separate is my dress shirts. They usually say to wash in cold water, gentle cycle, and tumble dry low.
Not in the slightest... the idea that all your clothes have to be washed separately is just a ploy to make you buy more laundry detergent, and fabric softeners... Don't want your clothes to run? Wash them all on cold. (Red and white is the exception, not the rule.) I am always hearing how blue jeans make your whites look dingey. Can't see it, and if it does... bleach your whites. POOF... problem solved. :)