Is Lust a Sin of Man?

I was wed unto a woman
Who shed fur in passion
And the dander filled my eyes
With tears when we retired to bed.

So that our chamber window remained open
And the air at night would cool my lids
And give me strength
And give her children.

Now she is dead and I lie alone,
Molting by myself,
An animal who knows it is hard indeed
To have sex and call it love.