Japan's obsession with boobs is really making me speechless.. They invade all manga. Is it because most Japanese girls have small boobs or something so that they are going crazy fantasizing gigantic boobs whenever they can? There is nothing nice having those gigantic monster melons hanging in front of your chest.
@Moth
I think it is more because of the readership than any real fascination with them, since it is easy descriptor to use when designing a character. With harems, they usually try to have at least one of each trope, washboard, watermelons, etc. so that there is one for every preference. Usually, with a more monogamous relationship, you see the trend toward average.
@Moth Oddly enough, though japanese seem to obsess over big tits, they mostly marry women with small to average breasts. Dunno if its part of the cultural betaness of the average japanese dudes kicking in or if they just view huge tits the way a lot of Americans view anal sex; "There's girls you introduce to your mother and there's girls you fuck in the ass."