I suspect that it was intended to be ironic on some level. Whether it's the irony of those crazy liberal's theory "proving" they should vote conservative, the irony that conservatives, who are often attacked as anti-womans-rights, should "logically" be getting the votes of women, or something else, I couldn't tell you. It could even be an attempt to show women information that "should" persuade them to vote for his preferred candidate, but somehow I doubt it. The tone just seems too jokey. Regardless, of course, it's definitely offensive, so it was a stupid thing to write; I may be overestimating the author.