Consider cultural perceptions as 'sleep with' can be seen as taboo or inappropriate to discuss openly in some cultures. In many cultures, it's not considered polite to talk about whom you have slept with.
Pro Tip 2/3
Informality
'Sleep with' is casual; for formal contexts, use terms like 'have sexual relations' or 'be intimate.' The report stated that the individual had been intimate with a colleague, using formal language.
Pro Tip 3/3
Emotional Weight
'Sleep with' can imply a range of emotions from love to a casual encounter, depending on context. She regretted sleeping with him, feeling that their emotional connection was lost.