@Setanta,
I am thinking that the heat factor had naught to do with temperature and, instead, referred to spice. Papa Bear clearly loved his Habanero Porridge. Mama Bear enjoyed hers on ice, of course, with a shot of barely thawed vodka on the side. As for Baby Bear, well, there's no accounting for taste. Normal room-temperature porridge! So hoi polloi!
As for the chairs, it seems that only Papa Bear's had any really good back support. Undoubtedly, as a member of the proletariat, he needed support as he has recently been diagnosed with a herniated disc (do bears have discs?). Mama Bear, representing the bourgeoisie, was cradled in creature comforts, hence the softness. Baby Bear's chair was, of course, produced in a Third World Country, and could not sustain Goldilocks's weight.
And don't get me started on childhood obesity.
The bed situation, naturally, points up major problems in the Bears' marriage, as they were sleeping in separate beds. I have seen photographs of Papa Bear, and I suspect he is suffering from sleep apnea. An ursine CPAP machine could help to restore marital harmony. Goldilocks did not wish to defile the separate marital beds any longer than absolutely necessary, stripped to her skivvies and proceeded to repose in Baby Bear's bed. It seems likely that she was waiting for Baby Bear's return -- probably to make a man (er, a bear) outta Baby Bear, if yanno what I mean.
Quod Erat Demonstratum, although it beats the hell outta me what I just proved.