Originally posted by: HumblePie
Just depends.. looked up some grammar guides on the internet and they both show Mens or Men's. Either way, one has to just be consistent when using either or. It seems both ways are correct. Since MEN is already in the plural form, adding an S by itself shows possession. Your example of Mike's versus Mikes is different. Technically "Mikes" is a bad way of saying more then one Mike but is grammatically correct. So you need to have the apostrophe to show possession instead of multiple Mikes.
Rule of thumb. If adding an S by itself would make it seem plural, you need an apostrophe. If it is already in the plural form, you can get away will adding an S itself. Men is plural so Mens is correct. Men's is also correct because you can not make a conctraction between Men and is for Men's.
There are other words that are screwy when it comes to possession and adding an S or an apostrophe S is wrong as well. "Who" doesn't become "Who's or Whos." The word becomes "Whose" for example.
I lernt maw Ngrish ofda Kraker Jak boks O K?