I remember visiting the Wall with a buddy who also served in Vietnam and we were telling each other stories about the funny things some of the guys we knew listed on the wall (specifically, a buddy I knew as "Wimpy" who was so skinny he could drop his pants at will by sucking in his stomach) and we were laughing.
A very angry lady came up to us and objected to our laughing and told us off. I told her "Lady, those were friends of ours. If we want to remember them happily, it's our right".
Thank you for your service. I can understand why humor is a release from all the things you went through.
When we visit the Wall, I weep. My fiance's name displayed, and even though I've come to terms with the loss, I still cry.