This happened to me twice on our just-completed long driving trip.
I'm in the left lane driving something like 14 over the speed limit (i.e., 84 in a 70). Seems to be a decent sweet spot speed at which highway patrol will let you keep going.
Typically speaking, I like to be as far right as possible, but if there are several cars in the lane to the right of me that I'm driving faster than, I will stay in the left lane until I pass them all, and then once there's a bunch of daylight ahead of them in their lane, I will move over.
On two separate occasions on this trip, a car behind me sped up to tail me closely. Seemed obvious to me that he wanted to pass me. But I was also passing a bunch of cars to the right of me, so not much opportunity to move over unless I squeezed in between two cars in a barely-safe manner. So I'm going to keep driving, while the car is tailing me, until I see the daylight in the other lane.
Once I see it, I move over, expecting the car that tailed to to zip past me. And darned if I didn't move over, and the tailing car keeps driving the same speed, instead of zipping past me. And I'm thinking, why the hell did you drive right up to me and tail me if you weren't signaling to me that you wanted to pass me?
I think it was G2 who articulated here the idea of the magnet driver, the driver who's most comfortable driving behind a target car and going as fast as the other car is going, whether it's driving 50 mph or 95 mph. I get that it's a thing, but I'll never understand the mindset. A friend of mine does that, I asked him about, and he either couldn't or wouldn't tell me why he does it. He just shrugs and says "i'n'know".