That's a really difficult question and depends on the situation. However, clinical data shows you will feel less anxious and people view you as higher status when you self disclose non-apologetically. Here are some ways I have self disclosed correctly in while presenting: \-I have smiled and said "I may stutter during this presentation but worst case you really understand the content because I have had said it twice" with a slight laugh. This will clear the confusion the audience may have faced and let them focus on the content instead of the stutter. \-I wore a shirt that said "did I stutter" when presenting. I felt less anxious and actually had a classmate compliment me and say "that's awesome" to me after. The key is to appear that you're aware of your stutter but do not let it control your life. I will admit, I do let it control my at times and let it get me down. However, appearing that it doesn't will help you. Fake it till you make it right. As for self-disclosing on a date, it's very tricky. If you come out and just say I thought you should know I stutter, it shows you give it much power over you. I have only causally mentioned it before dates by saying I just got done with speech therapy when they ask what I am up to or what's up. I am still working out a clever way to disclose it. If I figure out the secret sauce, I'll be sure to share it with you. Best of Luck!