For me it's anything around the house that's metal when wearing the shoes (which is nearly all the time as we have no carpet, and I work from home
)... I walk around the house touching the fridge, stove, TV, etc - shocks everywhere -- especially comical when I touch the TV and it reboots while my wife is watching something
Around the aquarium, mainly just the water - but since I have a grounding probe it's to be expected. Some of the other plumbing parts that are wet or have damp salt creap, same thing. Don't remember being specifically shocked by my lights (hanging AI Vega's) - but will give it a try tomorrow for giggles
long story short, fleece pants + crocs = constant static shocks...
But for the thread starter, this is another possibility why his wife gets shocked and not him (different clothing/footwear choices/etc)