symptoms 12 hours after? is that possible?
Simple D&V can occur within a few hours of contact with whatever arse related thing you picked up. Giardia typically takes one to three weeks to incubate and needs antibiotic treatment, there also asymptomatic carriers.
So the WG you blame may not be the one, it could have been a few weeks ago, also from infected water, touching contaminated surfaces, eating contaminated food.
People's immune systems vary.
How does a WG prepare for a rimming anyway?
Is there really any such thing as a fresh clean arse?
Risk reward kicks in.
Deliciously filthy