Why do I stutter significantly less with my 2 toddler kids? My reply? I think from an approach–avoidance perspective. Deeply subconsciously, your brain may have a reason to loosen the regulation of speech-plan execution whenever you speak to your toddlers. Example of reasons: My two toddlers don't yet know the meaning or propositionality of most of what I say. My two toddlers show reduced negative listener responses (when I speak to them). My two toddlers see me as an authoritative figure or educational parent, so I'll behave/be respectful (or so they might think). My two toddlers might focus (or worry) more about their own problems in life (they don't have any interest in critiquing your speech execution). My two toddlers don't see anything wrong with your speech, or they are totally okay with how you execute speech. My point is: I could write 100 possible reasons; however, only YOU are technically able to analyze your own subconscious brain's reasoning for why it weakens (or extinguishes) the LINK between regulating speech-plan execution and cues (or stimuli). Perhaps you can figure out which reason your subconscious mind adopts whenever you stutter LESS with your 2 toddlers. Attached diagram (that I created) explains the "reasons" (which I mentioned) https://preview.redd.it/d71265e2xbtf1.png?width=3028&format=png&auto=webp&s=6fcc92136920ce71d1986a67b1c19933402b8147