True that. A little bit of dirt is very necessary.
While we're sort of on the subject, one of my best friends currently attending NEOUCOM recently sent me the following slide from her med school lecture on appropriate antibiotic usages. I adore it.
HISTORY OF ANTIMICROBIAL THERAPY
2000 B.C. – Here, eat this root
1000 A.D. – That root is heathen. Here, say this prayer.
1850 A.D. – That prayer is superstition. Here, drink this potion.
1920 A.D. – That potion is snake oil. Here, swallow this pill.
1945 A.D. – That pill is ineffective. Here, take this penicillin.
1955 A.D. – Oops....bugs mutated. Here, take this tetracycline.
1960-1999 – 39 more "oops" Here, take this more powerful antibiotic.
2000 A.D. – The bugs have won! Here, eat this root