@teloz: Re “reduction in heat”,
If a bride/groom’s feet has to be cold
To keep all those microbes on hold,
Diabetics can’t marry,
In limbo they’ll tarry,
Or give up a limb if they fold?
(or they can wash their feet in a lukewarm & weak saline solution to bugger up infective single cells’ osmotic balance…and live happily&cosy-toed ever after 
)