Can you see that the picket fence to the left of the upright branch is mostly greeny coloured, but there's a raw bare patch at the top?
That's where the stems have rubbed it, while flapping about in the wind.
And when I cut off that stem, much lower down, and turned it around.....
So the lesson here, boys and girls, is that shrubs and trees should never be planted this close to fences, because they damage each other.
As a gardener, I care mostly about the plants: but as a householder, I can also sympathise with the fence!!
If you have any Buddleia in your garden, keep an eye out for the many, many seedlings which they produce, and be ruthless: dig out any which spring up right at the backs of borders, because if you don't, this is what will happen.
If you catch them early enough, while they are still tiny, you can replant them elsewhere in the garden, or you can pot them up and give them away later: but it's better not to let them choose where they plant themselves, as apparently they are not very sensible!