I smiled to others, but I laughed because it's 'u'. Even when your jokes could be unbearably dull sometimes.  

I can't be happy because there's no 'u'

I'm stunned because of 'u'  

During when we parted way, I fucked and hoped it was 'u' in between my arms, like it is in between 'f' and 'c'.

I'm only turned on because of 'u'

I regret not have addressed you as sweetly as your beauty deserves

"Princess"? "Sweetheart"? "Darling"? "Baby"?

No, there's no 'u'

How about "Uncle"? Sounds like a new kink to me. Or perhaps—

"My little Slut" would be best afterall