Seriously, this was a problem for me too. I was having multiple relights even with Sam Gawith's Dark Birdseye - reputed to "never go out" - because I would wait a minute or two between puffs, as I would normally do with a cigar.
I'm not sure, but I think the difference is that tobacco in the pipe isn't getting air to burn unless the smoker keeps puffing (unlike the old cigar, where the burning tip always gets at least little oxygen.
Now I take "long, cool drags" but much more often than before!
