I can only imagine asking my boyfriend this question. He would probably scratch his head and shrug his shoulders. If anything, he probably wouldn't notice the difference between a babydoll and a-line dresses. Now, I can't find a source on wearing babydoll dresses for fashion's sake, but only one as a lingerie piece. Men aren't savvy on babydoll dresses, which doesn't surprise me. They don't go into why. At the same time, wear what you want. Don't wear clothes just because guys like them. Do what you want. Be you.