What's the significance of her performing that move on Naruto's penis? (I haven't watched much of the show so I don't know a ton about the characters)

Its Jyuuken, the style of fighting from the hyuuga clan. It strikes pressure points usually to seal the chakra. It looks like in this case, Hinata is striking a vein to increase pleasure.

That's funny

Magma said:
Its Jyuuken, the style of fighting from the hyuuga clan. It strikes pressure points usually to seal the chakra. It looks like in this case, Hinata is striking a vein to increase pleasure.

if that's the case then Neji must be every girls dream as well.

i was thinking along the lines of him using his skills to please women, like Hinata is using in this pic.