What is the origin of the idiom "in bed with somebody or something" and when to use it?

The idiom "in bed with someone or something" has a figurative origin and is believed to have arisen from the notion of being physically close and intimate with someone in bed. It implies a close and often questionable association, partnership, or collaboration with a person, group, or entity, where one's interests, actions, or intentions might be intertwined or aligned. This idiom is often used in both negative and critical contexts, suggesting a level of coziness or affiliation that may not be in the best interest of all parties involved.

What is the origin of the idiom "in bed with someone" and when to use it?

The idiom "in bed with someone" has its origins in the literal act of sharing a bed, which is often associated with intimacy and sexual activity. It is used to refer to a person's sexual involvement or intimate relationship with another individual. It can connote a sense of disapproval or criticism, suggesting that the sexual relationship is seen as inappropriate, forbidden, or socially unacceptable.