Oh and FTR, when DP was housesitting and I was visiting her from interstate in the first year of our relationship, we slept on the sofa bed because DP was asked not to stay in the guest bed. IMO it would have been disrespectful in the extreme to use the bed as we were asked not to.
So no, not all 20-somethings will bonk all over the house including in your bed.
Finally someone else who would sleep in the bed they were allocated! I spent 3 months house sitting with 2 friends in a massive house. None of us ever even went into the owners' or their daughter's bedroom, even when we had friends come to stay. There were other rooms we never used as well, mainly so we wouldn't ever have to clean them!
Edited by SeaPrincess, 17 December 2012 - 08:39 PM.