A few years ago, I witnessed one of the most heartbreaking moments when my uncle died.
It was an open casket, and my aunt (his wife) approached it. She looked lovingly at him, then straightened his tie, straightened his lapels, and ran her fingers through his hair. Then she kissed him on the forehead. I don't think I've ever been so touched in my life. They were married for ~40 years.
I personally wouldn't go up there, I don't think I could.