say....I think it IS a very powerful form of expression :p I would say a good long-standing relationship is a very outstanding work of art, really, the level of expression between two people in love I belive is quite artistic.
but taking the subject at hand, what are the limits of sex? isnt foreplay part of sex? I would say so.
so then, foreplay is the arousal that precedes the actual intercourse, men are very easily aroused by sexual imagery, therefore images of sex are sex. So if images of sex are art, sex is art. MWAHAHAHAHAHA
sorry, couldnt resist =) I know this is still off topic but I really belive what I wrote c.c