Yes, this happens to me too. So many things get me thinking about music/songs because I'm a music nut myself.

Additionally, it also happens during certain seasons of the year. For whatever reason, certain songs will remind me of the feeling I get during the winter, spring, summer or fall seasons. It might be kinda hard to explain, but I feel different "auras" or just something during the changing seasons, and certain songs relate to those feelings. Does that make sense? *giggle*