Feedback offer
The purpose of giving feedback is to help others to learn / to improve. So before sharing feedback, ensure that the other person understands your positive intentions in sharing it. https://hbr.org/2016/08/how-to-make-feedback-feel-normal https://www.linkedin.com/pulse/power-proper-feedback-margo-manning https://hbr.org/2015/08/the-key-to-giving-and-receiving-negative-feedback
When you ask permission to give feedback, for example by asking the question “Can I give you some feedback about your presentation / talk?”, you will recognize that the person has the possibility to get herself / himself into a healthy emotional state before the feedback arrives. will be less defensive about the feedback. https://hbr.org/2015/08/the-key-to-giving-and-receiving-negative-feedback https://medium.com/@AdamMGrant/stop-serving-the-feedback-sandwich-bc1202686f4e#.yunjvd150
Would it be helpful to you that I give you feedback about how you….? Adapted from https://hbr.org/2014/06/everything-you-need-to-know-about-negative-feedback https://hbr.org/2011/03/dont-be-nice-be-helpful https://hbr.org/2010/03/how-to-give-your-boss-feedback
Further inspiration
https://www.teacherspayteachers.com/Product/How-do-we-give-feedback-1761017