男人最喜欢听这些赞美的话

Yes, this helps his self-confidence. But it also tells him that you just saw another woman looking at him and you're not afraid to tell him. It shows that you're confident enough to know that he won't be lured away by another gal.
没错，这样说可以提升他的自信心。而且，你敢于告诉他你看到一个女人正看着他，这也说明你对他信心十足，相信他不会被其他人勾引走。

2. I love it when you [insert action]. 我喜欢你(做某事的样子)

This is one that can benefit you as much as him. If you don't tell him what you like, he's just flying blind. In fact, if you haven't complimented him he might even think you don't like what he's doing. And of course, the more you tell him you love it when he scratches your lower back, the more he'll do it.
这是一句让双方都开心的话。如果你不告诉他你喜欢他哪一点，他就不会知道。实际上，如果你不赞美他，他甚至可能觉得你不喜欢他正在做的事情。当然，你越是跟他说你喜欢他怎么做(比如搂着你的腰)，他越是乐意这么做。

3. I love your [insert body part] 我喜欢你的(某个身体部位)

We're not gonna lie, one of the best fill-in-the-blanks here is, "I love your you-know-what" (or whatever word you can say without laughing or blushing too much.) Men want to know that you're attracted to what they have.
不是让你去撒谎，最适合填空的话就是：“我喜欢你的某某地方”(或者任何讲起来自己不会发笑和脸红，比较靠谱的赞美话)。男人都想知道自己什么地方吸引人。