The phrase "tell blue stories" can have negative connotations, suggesting the telling of inappropriate or overly explicit stories. There are several synonyms that could be used to describe this behavior in a more neutral or positive way. For example, one might say someone is "sharing candid anecdotes" or "recounting personal experiences." Alternatively, someone might describe someone as "telling it like it is" or "pulling no punches" when they speak candidly or frankly. Additionally, someone might describe this behavior as "being brutally honest" or "speaking one's mind." Whatever the phrasing, it's important to communicate clearly and respectfully when discussing sensitive topics.