Question for you guys...(and gals)

(probably for people over 25 or so)
Going about your normal boring daily life, do you ever have times where you sense a feeling of something that happened during your younger years (adolesence).
I've been having them here the past few weeks, just out of the blue for no reason... Might be a familiar smell that sets it off, or a memory of something.....
But it has a great calming effect and makes you wonder if life will be as simple as it once was... It only lasts a short time then reality hits you in the face.....
Anyone know what I'm talking about or should I get sized for my straight jacket and reserve my room in the nut house???