Unwanted Advice
Now here’s a guy who seems to have mastered the annoying art of mansplaining. Apparently, the OP was working out at the gym and getting ready to do some squats when a man walked up to her and asked if he could spot her. Although she politely declined, he proceeded to explain how squats work.
He even got into where she should put the bar on her back, how her feet should be positioned, and how she should breathe. She had to finally stop him and let him know that she was not only a personal trainer but also a competitive powerlifter, and had a national-level powerlifting coach. Ha! We can only hope that he got the point and backed off after that.