First, imagine you’re so very thirsty. You drink semi cool water and guzzle it hardly stopping to breathe the moment it enters your mouth.  
Now imagine you’re favorite drink. That is gone before you know it and saddens you when you realize it’s gone.  
Then imagine a limitless supply of these you can drink from a tap that works as long as you suck and pump it.  
These sensations are what you will experience when you suck on Infinite’s cock.