Only one aspect of sex is a legitimate field for legislation: the protection of
minors and of unconsenting adults. Apart from criminal actions (such as rape),
this aspect includes the need to protect people from being confronted with
sights they regard as loathsome. (A corollary of the freedom to see and hear,
is the freedom not to look or listen.) Legal restraints on certain types of
public displays, such as posters or window displays, are proper—but this is an
issue of procedure, of etiquette, not of morality . . .
The rights of those who seek pornography would not be infringed by rules
protecting the rights of those who find pornography offensive—e.g., sexually
explicit posters may properly be forbidden in public places; warning signs,
such as “For Adults Only,” may properly be required of private places which are
open to the public. This protects the unconsenting, and has nothing to do with
censorship, i.e., with prohibiting thought or speech.