Not enough room or the person snores
snoring
Methane!
crowded
no disadvantage its all nice if its sum one nice
Snoring talking in sleep
One disadvantage of sharing a bed with someone is one gets to share the covers with the other. Another disadvantage is dealing with the other's snoring.
If you have a boyfriend, and your in the same bed as him, chances are you might have a love connection( have big feelings for each other in 2 seconds) and have sexual intercourse(sex).
snoring and sicknessess
The chance of communicable diseases would be one.
bed house bank account car
For example, if a person has a problem with wanting their own personal space and the bed either being big or small but the person moves a lot in their sleep then it may interrupt the partner's sleep and thus being uncomfortable.
The disadvantage of having a high bed is that it is inconvenient getting in and out of bed. Especially if one has issues with mobility. It is also difficult to make the bed if it is too high.