I have a real "if you can't say anything nice...." policy for SM but do make an effort to say something nice, when there's something nice to be said.
I've been away for the weekend with a mixed group of friends. One of the men is married, he's been on these trips a few times, his wife doesn't enjoy them and is happy to send him on his own.
One of the photos of him is really good. He's not a traditionally good looking bloke, but there's something of the film star about this particular picture. (I didn't take it, someone else has posted it).
He's a modest sort and always very well behaved on our trips, he'd have enjoyed the compliment, I think, but I didn't say it in case it seemed off to his wife.
Which was the right thing to do?