Why do bad dreams have to feel so real.. had a dream my man cheated on me.. well sorta lol he didn't…

Why do bad dreams have to feel so real.. had a dream my man cheated on me.. well sorta lol he didn't actually do anything because I cough him before he could a threw a jar or mayo at him lol but I could see what was about to happen cause they were both turned on... but anyways I know in real mm life my man would never cheat on me he's so divoted to me and treats me better then any man I've ever been with he really treats me like I'm the only women on earth and I really have no worries but I guess in the back of my head I'm still scared cause both of my other kids father's cheated on me