Not all attraction is lust, but the former is generally manipulated by it. I would say that those are some good examples for how lust manifests: however, there are countless ways it may manifest, many of which will be particular to you. Therefore, you must study yourself in depth.
One thing, though, is sexual attraction and magnetism. Another thing is lust. Knowing the difference takes comprehension. With other humanities, or conscious individuals, they know how to utilize sexual magnetism with their partner in a positive way. The problem with our humanity is that while that force may be present between a couple, it is converted into the monster of fornication, which destroys relationships and society.
As for whether yearning has sexual connotations, it depends; you have to analyze yourself profoundly and ask, "What exactly does this thought or emotion want?" Or "How does this feeling want to make me act?" Meditation is the answer.