Advances in medical science have allowed geneticists to map out the ever finer
details of the mysterious Y chromosome.  Femigeneticists the world over have
been astir over the recent discoveries of the following gene loci, which had
previously been observed for centuries but, up to now, never been associated
directly with genetic or environmental factors in the male Homo 
sapiens species:

   - - - - ____
    11.32 /____\ --- Testis Determining Factor (TDF)
          |____|
    11.31 |    | --- Three Stooges Appreciation (Curly Stimulation Factor,
          |    |     CSF)
          |    |
  p       |    | --- Gadgetry (MAC-locus)
    11.2  |    | -\
          |    |   > Channel Flipping (FLP)
          |    | -/
          |----| --- Catching and Throwing (BLZ-1)
    11.1  |    | --- Self-confidence (BLZ-2) (noteably unlinked to ability)
   _ _ _ _ \--/
           /--\
    11.1  |    |     Ability to remeber and tell jokes (GOT-1)
          |----| --/
          |    | --- Sports Page (BUD-E)
    11.21 |    ||--- Addiction to death and destruction movies (T-2)
          |    | \-- Air Guitar (RIF)
    11.22 |____|  \- Ability to identify aircraft (DC-10)
          |____|
  q       |    ||--- Preadolescent fascination with Arachnida/Reptilia
          |    |     (MOM-4U)
          |    |
    11.23 |    ||--- Spitting (P2E)
          |    | \-- Sitting on the toilet reading (linked to Sports Page
          |    |      gene)
          |    |
          |____|
          |----| Inability to express affection over the phone (ME-2)
          |    |  \- Selective hearing loss (HUH?)
          |    |   \
    12.0  |    |     Total lack of recall for dates (OOPS)
          |    |
          |    |
          |    |
   - - - - \--/