Answer the question about text:

I imagined sitting and smoking the shisha again , which so perfectly slows down the flow of time . Talking in our unpolished english about religion and politics and women and our biographies . Judging from the dark void punctuated by these few signs , we could be headed everywhere , Chiapas maybe , or Athens , or Sassari .

What about shisha causes it to slow down the perception of time ?
The shisha coupled with good conversation seems to prolong the flow of events