In cultures such as the Inuit culture, where mothers traditionally and continue to prefer to bed-share with infants, advising against bed-sharing under all circumstances may not be easily accepted.
And while the very presence of another person in bed increases the chance of sleep disruption, 62percentt of those polled in the foundation's annual sleep study said they preferred to bed down with their partner.
Early rehabilitation, although difficult in many cases, should be preferred to bed rest once rescue has been completed.
Would you prefer to be in bed at home?
6. Are you closer to Labour or the Tories on education policy, and who would you prefer to be in bed with?
Now we're older and wiser and prefer to be in bed by 11pm we're able to appreciate Geoffroy Mugwump for the talented artist he is, and we're able to get excited when he talks about releasing new films to accompany new records.
Paul Newman would prefer to be home in bed.
As for the literal "on top" part, it's true that you might prefer to be underneath in bed and still be a feminist.
This summer, during a chat about his career, the American designer Rick Owens said that after years of clubbing and experimentation, he now prefers to be in bed early.
But it would be a remarkably thick-skinned politician who did not prefer to go to bed each night having read supportive rather than critical coverage in the first editions of the following day's papers - and few papers have provided more supportive coverage for Blair than the Sun and the Times.
Morning types prefer to go to bed earlier, wake up earlier and be active in the morning, whereas evening types have a preference for going to bed later, waking up later and being active in the evening.
