DH and I are young: both 21, although people are always surprised to hear that, so I guess we look older. He certainly looks older, bless him: he already looks like he's in his 30s. Up until about three weeks ago, we lived in a college town. This college happens to be a military college, and the town is tiny, so it's very common to see people walking around in full army uniform who actually aren't in the army (they're ROTC cadets). No one has ever stopped to thank DH for his service, because they look at him and assume that he's "just another cadet".*
We went grocery shopping last night, and he was in uniform. Three people, complete strangers, stopped us to thank him for his service. They shook his hand, introduced themselves by name, and seemed genuinely thankful (it wasn't just a "hey, thanks": not that there's anything from with that either). They thanked me for supporting him. They congratulated us on the baby. They thanked him again, and flipped their stuff when they learned how young he is, and how long he's already been in the army for (4 years).
It almost made me cry. We're so used to people assuming he's one of those irritating college students who is just doing ROTC to get a free ride to college *. This was the first time something like this happened. It made my night, and his too
* Edit: NOT how I/we feel about cadets; but that's how people see cadets in that little town. It wasn't a great place to live. Sorry if I've already offended anyone before I could make that clear :S