I will have to admit, I've always wondered what they felt like. However I have never asked somebody if I could cop a feel.
I too, have a buxom chest, especially now that I am pregnant. I was a 34H, and I've gone up a cup size or 2. I have to get custom made bras, because nothing else will fit me.
When I worked as a waitress, one of my female co-workers would ask to cop a feel out of them. I completely killed ANY future approaches by ANYONE, by saying in a confidential whisper "omigod are you a lesbian
?". Then after she got the confused stunned look on her face, I said in a normal tone "You are! I never knew you were a lesbian
! How come you didn't tell anybody? That would have been a great way to stop that perv that was stalking you! That's so great that you are comfortable with who you are sexually." I'm getting louder and louder at this point, and she's starting to stammer that she wasn't, she had a boyfriend and merely wanted a feel. At this point, people had started looking over their newspapers. "Well, your homosexuality is perfectly fine with me. I'm so happy that you felt comfortable to let your lesbianism out in the open for everybody. That's so brave of you! However you should know that I'm a heterosexual, so unfortunately we wouldn't work out. Thanks for the offer, though. I'm flattered." I went back to my work, and left her standing there. No one EVER brought it up to me again.
All that to say, that it made me feel like an absolute freak, and I did NOT appreciate that. I'm sorry that people are so insensitive and rude to you. I hope you can find the perfect stinging reply to everyone who feels like they can treat you like a mannequin.
Edited because I am a dork, and didn't copy and paste all of my post into the reply box.