13. There are motion sensors in the Oval Office’s floor.
One of the Secret Service’s rules is that the president shouldn’t be left alone. And if the president wants to stay alone in the Oval Office without agents, they can easily trace any movement and any potential threat with the help of sensors in the floor.
12. They participate in the president’s hobbies.
As the president can’t stay alone, agents have to participate in everything in his life. Mr. President, do you want to go for a morning run? No problem, we will go with you. Do you want to take up hiking? We’re in. Do you want to try skateboarding? Well, you know…