I've looked at this topic so many times and I still can't decide if the OP was serious or not.
There are more important things it is true but sex is essential to life! For a start without it we'd be in lot of trouble because without recombination of genes our species would never have survived.
Having said that I will agree that if you can't find the right person and/or don't have the right bits it may not seem so much fun.
Personally though I'd say yes it is a need, maybe not a priority need, but a need none the less.