a)find them better than glasses
or b)think they'll look cooler without their glasses.
Watching people put in contacts is rather gross, and some people will tell you they hurt a lot or aren't worth all the trouble they cause. But many others love having contacts and would never go back to wearing glasses.
2) people you contact for information (similar to sources)
2) My contacts within the agency told me that the president was planning to unleash a new program soon.
"Contact" works in any situation, e.g. if the person does not have five fingers, or uses another part of their body.
person 2: Contact! (hand slap)