The phrase is casual and might be inappropriate for formal conversations.

Informal Usage

Some people might find it offensive or too personal as it refers to cohabitation or sexual relationships.

Potentially Sensitive

In some cultures, living together outside of marriage is common; in others, it's frowned upon.

The phrase often implies a temporary living situation, not a permanent one.

It suggests a living arrangement based on convenience or necessity, rather than desire.

It's not exclusively romantic; it can refer to sharing space with friends or family.