Sure, no problem with that. All you need to do is to contact the nearest U.S Social Security office, or go to your nearest U.S Embassy or consulate.
Soryy to ask, but what was that section you mentioned in case to be never married?
Yeah, don't worry. That would be How to apply for retirement benefits or medicare section.
Thanks, i got it now. Oh, another thing. I was told that even if  i never worked, i could get some benefit from spouse, is that true?