Consider the listener's feelings when using 'close to the bone' because it may touch on personal issues. I didn't bring up his job loss; it felt too close to the bone.
Pro Tip 2/3
Avoid in Formality
'Close to the bone' might be inappropriate in formal contexts due to its personal and sensitive nature. In the interview, she steered clear of anything close to the bone.
Pro Tip 3/3
Cultural Sensitivity
Be mindful of cultural differences; what's considered 'close to the bone' can vary widely. His comments on politics were too close to the bone for that international meeting.