Why do rec swimmers split the lane?

This is really annoying to me, but why does it seem the first option for most rec swimmers is to split the lane when there are 2 swimmers. I always say we should swim circle if I am in the lane and someone else is coming in, but if I am coming in the person usually wants to split the lane. It is so unnatural to be swimming on the left side of the lane.
Parents
  • had to split today. he was slower but i was next to a lane of 13yr old boys. when they went by, it was hell. i got whacked in the head, kicked under the lane line but they couldn't help it ,they had 4 or 5 to a lane. i noticed my times were slower than if i swim alone . is it the wave factor that adds to time?
Reply
  • had to split today. he was slower but i was next to a lane of 13yr old boys. when they went by, it was hell. i got whacked in the head, kicked under the lane line but they couldn't help it ,they had 4 or 5 to a lane. i noticed my times were slower than if i swim alone . is it the wave factor that adds to time?
Children
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