Saying you are a fan of boobs in general is has shit to do with the chick. It's not offensive on the common sense detector and is a 9 on overreaction scale.
Yes, it was, without a doubt, unprofessional. And as a female, I did find it somewhat disrespectful. I also saw what I thought was a bigger purpose and so I laughed. I didn't threaten to sue, go ballistic, or act stupid. I had an opinion because I have a unique perspective on this topic. I also didn't expect any of the hetero men here to agree with me.
I mean, if I was at work and a female coworker said, "god dammit I love dick", I just might stand and clap.