Is it wrong to make jokes to break the ice?

Well I was at the community art class today, we are a group of mature students that like painting and drawing. We did get a shock when we walked in and realised we were doing still life today!
The model, in his late 40s walked in, and you could have heard a frog piss on cotton when he disrobed. I just laughed and said "wow, someone is feeling the cold today" & "talk about a tiny paintbrush" It broke the ice and everyone relaxed but the model gave me the evils.