Parents/Caretakers: How do you walk the fine line between wanting your children to explore vs. not wanting them to touch things that are too dirty, germy, disgusting, repulsive to you?

My two year old often wants to touch things that i consider totally gross, like in a public bathroom, or in other public places. I don’t want to stop her natural urge to explore, but i try to keep her from stuff that’s gross. sometimes it just skeeves me out. How do other parents handle this?