It is a Shonen manga, so of course, discovering sexuality is also a main theme, so there are lots of it implied. I read a whole lot of interesting interpreting in a French forum I've signed up for, and it's pretty well-thought. First, there are what we may call phallic substitutes: -Big/Giant swords that are wielded by some of the guys who aren't really secure and sure of their sexuality, which is why we find them in the first blatant homosexual couple: Zabuza/Haku. Zabuza wields that very big sword because he feels uncomfortable and unsure of his sexual orientation, which explain why, at the very end, when he stopped denying his feelings for Haku, he did it without his sword (which was very important to him). -Tayuya's flute and Temari's fan, which explains why those girls are more tomboys-like, less girly, more ass-kicking. -Sai's katana is short, but sharp and efficient. I expect it to be more of a reminder of where he stands in the sexual cycle, being raised by the Root had somewhat clouded that. Which explained his obsession with man genitalia. And there are fight in which the sexual innuendo is very strong, on of which being Sasori vs Sakura. He attacks her with sharp tools (phallic substitutes again) while she keeps on evading him. Then there's the killer sentence from Sakura: "I can't control my chakra" which reminds me of something else . So the whole fight is about Sasori trying to 'take' Sakura, and she will willingly take the blow in the end (In other words, Sakura's just lost her virginity). But she's not the only one: Pain hit Hinata with one of his sharp rodes, in a spectacular panel. Kishi insisted on the sound effect and Pain's position (standing up) and Hinata's laying at his feet. In other words, Hinata just got raped by Pain. Which explains why she's not dead after that blow (which Kishi really focused on). That's it for now. I'll get you some more later.