Throughout history, conservative groups have ascribed to a particularly irksome idea: If they do not want to do something, nobody else should be able to do it either. Thus, conservatives attempt to use the state to coerce people to conform to a specification or to prohibit something entirely.
Why does this keep happening? How does the mere ability to engage in something invalidate or abridge a conservative lifestyle? Regardless of whether or not something exists, individuals are free to chose not to participate. They can even attempt to convince others to join them in abstaining.
Instead, there is a constant effort by conservatives to eradicate from the world that which they decry. To me, this suggests a fear that the belief system itself is insufficiently convincing and thus needs outside help to be implemented. If it was so desirable in actuality, people would be motivated to follow it, and the Very Bad Thing would eliminate itself.