I don't have any evidence to substantiate this but sometimes I think Jet fumes make me dill and lustless.
Also am suspicious that too many hours sitting in light pistons mustering with too few opportunities for yoga classes (stretching exercises)may have shortened my hamstrings which in turn has given me a sway back which in turn causes me back pain.
Not forgetting either the pterigium in my left eye caused by years of exposure to clear, bright Aussie sunlight and not wearing decent sunglasses.
Theres also just a chance that the crown padding in my helmets has caused my hair there to fall out.
I'm pretty sure the hypochondria is hereditary though.