I think Senryu is a haiku with theme on human.And i think what majorly differentiates a haiku from a Senryu is the use of simile and metaphor in Senryu,though some people use simile and metaphor in haiku too.If you could find time to research you will definitely find out theme on human in haiku is acceptable.Thank you so much Mr raj for your time,I appreciate.

Hello Jess, I intended sending you a PM in this regard, but I have had so much on my hands these few days. I really appreciate your efforts but I still wonder how you always make out time for my works inspite of your tight schedule. I really doubt if I got your demand here clear, Jess.

Oh, oh so sorry Jess
Do you mean the phrase " In My Craft Or Sullen Art"?
It is from Dylan Thomas's poem.

In my craft or sullen art
Exercised in the still night
When only the moon rages
And the lovers lie abed
With all their griefs in their arms,
I labour by singing light
Not for ambition or bread
Or the stut and trade of charms
On the ivory stages
But for common wages
Of their most secret heart.

Not for proud man apart
From the raging moon I write
On these spindrift pages
Nor for towering dead
With their nightingale and psalms
But for the lovers their arms
Round the griefs of the ages,
Who pay no praise or wages
Nor heed my craft or art.