Why does the Poison Oak hate me so??

I go in the yard to do weeding
To prepare for the new plant seeding

I pull up the dead
Cleaning out the winter bed

Sitting on the ground
Digging around

I make a nice pile of debris
Go around the cute small tree

Everything looks delightful
No more the mess that is frightful

I go in the house and scrub
To get rid of any dirt I rub

Go to sleep at night
Wake up to a sight

It seems the poison oak has found me
Where you say? On my knee!

My knee is so red
The itch makes me out of my head

I should have known not to lie
On the ground though it was dry

I suffer from pain
It is such a drain

Why does the poison oak hate me so?
I don’t think I will ever know!