I grew up in Spain and I rarely slept with any of my guy friends pass the age of 8 or 10.
My wife thinks is OK for 14 yrs old boys to be sleeping in the same bed and her reasoning is, 'well they all do it.' Finally she ok for us to buy an air mattress for future friends visit over our home. When any of our son's friend do come over to stay they sleep in the same bed.
