This just leads to sill propositions and exclamations like "Now we all have to sign a contract before we kiss another!". Human communication is complicated and

This just leads to sill propositions and exclamations like "Now we all have to sign a contract before we kiss another!". Human communication is complicated and complex and error prone. Combine it with sexuality and you have a mess. There must be room for error and for dialogue. Humans are not binary machines. We're probabilistic ones.