``What are big breasts for?'' To bind, to tease, to have sex. - A work for sadistic big breast maniacs who use big breasts as sex toys and an outlet for their desires. - Big boobs with candles hanging from them, big boobs that are tied up tightly, and big boobs that are popping. - Masochist big breasts that become more obscenely beautiful the more you tease them. - A masochist woman who is being rubbed, played with, and has an expression of ecstasy. - Look at the essence of big-breasted training, which appears to be one-sided but actually has mutual interests.