Waiting Room Etiquette

So I was at the doctor yesterday, and the waiting room was full of women... except for one man who was obviously waiting for his wife. I am talking there was not a seat available in the waiting room... it was full up. When another lady walked in, I thought, "Well, surely that man will give up his seat." But he didn't. All he did was glance up, then stick his nose back in a magazine. That lady ended up standing until someone was called. I offered her my seat, but she said no. I just thought that was R-U-D-E!