If someone has a staph infection on their tonsils, can you become infected by kissing them?

Yes: If two people are kissing, they will share whatever bacteria are in their mouths and throats. For bacteria like the strep throat bacteria, the well person will usually get sick after catching strep from the sick one. With staph bacteria, the well person may not get sick because staph doesn't cause oral infections in everyone.

Yes: Staph is infectious and contagious. You could catch this by kissing someone if they are infected.