I have worked with twins for the last 8 years. Jennifer and Kimberly. I couldn't tell them apart until I learned that Jennifer wears jewlery. They have both changed their styles since 8 years ago but I have never confused them since.

Worked with some other twins, Matt and Mark. Never figured those out except for I know where Mark lives. If I see them in public, I say "What's up Man?"

 

There are twins that went to my high school and now both go to OSU. One gained weight and from then on was known as "the thick one".

 

Grab one of their units. Palm his junk. I'll bet money you won't run into that guy again.

you'll know the other one by process of elimination.