Back in the 1950s, during a spate of ludicrous obscenity trials, one of the more enlightened judges made the point that juries having to decide whether a novel would tend to 'deprave or corrupt' should not have to assume that the typical reader would be a fifteen year old girl. Adult readers can always skip a passage they find offensive or, in extreme cases, stop reading the book altogether. Much the same goes, I believe, for sexuality. It has to be up to individual writers to write what they have to write for the readership they wish to reach. No one is forced to read a novel, just as no one is forced to sit watching something they dislike on television.
Most readers are more than capable of exercising that choice.
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