A nice plumbing related comic strip by Rick Kirkman & Jerry Scott, Baby Blues Funny for a plumber though, as in 99% of the cases, there is no need for tape. The supply lines to the faucet if flexible will have rubber seals on both ends. If it's solid risers, then they are compression at the shutoff, no tape there. The p-trap uses slip joint washers, no tape there. But I can see where the hardware man liked him. He got to sell him more tape.