There is still a small layer of air between them. Moreover, they are probably single-mode fibers, so, even if they touch each other, it is very hard to provide energy transfer from one fiber to another.

How can fiber optic image conduits consist of only fiber core, no cladding?
How long does it take for a calf to be full grown in Harvest Moon A New Beginning?
And for that fact, what about the other animals? (chicks, sheeps, you get the deal)
