No writer in a free country should be expected to bother about the exact demarcation between the sensuous and the sensual; this is preposterous; I can only admire but cannot emulate the accuracy of judgment of those who pose the fair young mammals photographed in magazines where the general neckline is just low enough to provoke a past master's chuckle and just high enough not to make a postmaster frown.

Nabokov's congeries (ed. 1968)