I would clarify some details here (couldn't I as this is one of my most favorite scenes n the whole Saga ). I don't think in the scene there is some challenge or daring for anybody of them. All the opposite, they are so vulnerable, I mean both of them. Many would define Padme's dress as seducing. I don't think so, at least not in the same way as is the black dress of the fireplace scene which is obviously seducing. The lake dress of Padme is absolutely gorgeous yet it very different from her also gorgeous senator outfit that she wears. First, the senator dresses are beautiful yet in the same time look like armor: they cover and protect Padme and change her to convert her in Senator Amidala. The lake dress shows her as Padme: it is beautiful, colorful and light to wear, but also comfortable differences from the black dress that is tight and uncomfortable. The lake dress has 'wings' so Padme feel absolutely free and happy. In the same time it is very feminine without being 'uncovered' too much (Trisha Biggar is simply the Jedi master of the costumes. So Padme is not putting Anakin to a challenge or a test , she is just happy to be herself, to be herself in one of her favorite places and to be herself with someone for whom she obviously have some feelings. Padme wants to share this moments with Anakin, moreover, she feels free and safe to be there with him, that's why she is so vulnerable to him. And is how Anakin reacts: so gently so shy, even insecure. I don't think that in that moment Anakin wants from Padme to like him in a particular way, all that he wants is to reach her, because she was so far away; not only for the 10 years of distance. She is the queen of his dreams (as he explained earlier) and he touches in a way as he fears that this dream would disappear He dares to do that only when he saw Padme appearance: not the important senator Amidala, not the presuming refugee, in that moment she was indeed Padme in the shores of her favorite lake, sharing a very special place and moment with him. What I really like in Anakin is the way he treats Padme (I'm talking about everything before the particular moment in Mustafar, of course) : while he doesn't have social manners at all, he has this internal chivalry of the heart that helps him be so gentle with her. Gentle and also vulnerable and confused (let's not forget that he apologizes after the kiss). That's why I like this scene so much. Of course, as you noticed they both feel uncomfortable but it cannot be comfortable as they have to deal with feelings that they never had before ad even in their case, they shouldn't have at all.