[meric]

http://www.paulgraham.com/say.html

There is a significant proportion of feminists who are against prostitution and pornography because it exploits women's bodies, and your statement can be used as a potential argument to dislodge their beliefs.

On the other hand, it is more unacceptable to suggest at times a person might not be always fully rational, and even more unacceptable to generalize this to a group of people. So your statement has brought up a contradiction in the beliefs of a subset of people, which you're not supposed to do.