Disclaimer: I do not own Naruto
It started as a dare.
Something they didn't expect her to do but she wanted to be different, she wanted to be bold, she wanted them to stare in awe. With wanting all this she didn't care how he responded as long as she lived. So when Ino stomped up to the training grounds past TenTen and Lee she didn't hesitate to spin him around and press her lips against his. He tasted like sweettea and she decided she liked it and when he didn't push her away she decided she liked that too.
Maybe it was temporary insanity.