I am unsure if this is intended or not, but I found it quite strange that when placing a bed, the top half completely ignores mobs.
What I expected to happen was...:
When there is a mob in the way of the top half of the bed, I am unable to place it.
What actually happened was...:
I am able to place a bed as long as the bottom half of it is free of mobs
Steps to Reproduce:
1. Find a mob
2. Place a bed on a corresponding block from the mob.