Utter rubbish from your own feeble mind...and potentially lethal. Babies and toddlers are far more susceptible to colds and chest infections as their immune system has not yet developed fully. The advice is to maintain a temperature of 18c..see NHS, Midwifery council etc etc...
By the way the sudden infant death rate in the 30,40 and 50's before central heating was 8% , by 1970 it was 0.25%...creating a warm space for all babies is part of the current government strategy for reducing infant mortality and was one of the key principles in setting the fuel support package.