I've always worked on the principle that a woman who's comfortable with her body, to the point where she'll show it off, is not usually offended by people looking. I always suspect they like the attention.
We have a well endowed girl at work who was talking about some guy or other she took a fancy to. At some point she said...'he didnt even look at my boobs' (to some people that in itself sounds awful..but she's a really nice girl).
I said (in a mickey taking manner) ..'do you feel let and rejected down then when people don't look'...
'I do' she said.
'I'll do my best to make sure that doesnt happen with me then'
Sounds as though its the guy who's got the problem, and even then, he's entitled to his opinion. But he probably should have kept it to himself...or at least worded it a bit better.