Force marriage is rape.
Even in liberal country like German, prostitution is taxed. Tax is fine. Fine is punishment. Existence of punishment means prohibition. Prohibition of something means enforcement of the alternative. The great alternative to prostitution is marriage. So all marriage is forced marriage. Which is rape.
Basically by taxing prostitution, German government effectively provide forceful intensive to get married.
Most other countries are far less liberal than German. In afganistan, sex outside marriage is illegal effectively forcing anyone wanting to have sex to get married.
Can we conclude then that all marriage is non consensual?