I've noticed lately that socks are beginning to be packaged as partners... Meaning, there are two particular socks in a package of 8 or whatever that belong together. Somewhere on the sock, there's a special color that denotes which socks go together. The last two packs of athletic socks I've purchased, one from Old Navy and one from Nike, both had the special "color coding."
Yes, I'm nuts (and a tiny bit OCD) but I'm loving my married socks!