a (PhD) thesis is like chocolate

http://www.flickr.com/photos/hozinja/4864042453/ cc

Both make you fat
Can be bitter sweet
Some look better on the outside and have centres that dissapoint
Can be a self indulgent activity
Both give highs and lows
Both can result in guilt
Over indulgence in either is sickening
Some are better quality than others

Thanks to Nick for reminiscing on winter schools long past
Please feel free to add to the list