I would not like to hold only 'Uncle Forest' Mars to book for my interesting mental condition. I did get interviewed for their graduate management programme. I tell you two days there ,with unlimited access, to the goodies is enough to cure you! Although I do believe ,imho, the SAS are a little more 'cuddly' with their selection process! lol.
Only the Lord alone knows what wafted through my office window on the worlds largest trading estate, opp the Burtons biscuit factory, to make me the unique, well balanced individual ,before you today.
Our school used to have a tour round the Mars facilities for the visiting foreign exchange students ... then someone invented the HSE, and it was forbidden tout-suite! Those were the days.
Apoligies to helen79 for mini hi-jack. But nickmo's first answer was splendid and complete.