Get clear, enthusiastic consent first
Ask what feels good and what does not
Go slow at the start
Use plenty of saliva or lubricant
Keep your teeth from making contact
Use your lips to cushion your teeth
Vary speed, pressure, and rhythm
Pay attention to their reactions
Use your hands to help if comfortable
Focus on the head and shaft as preferred
Take breaks if needed
Breathe through your nose when possible
Keep communication open
Stop immediately if anything hurts or feels wrong
Practice good hygiene before and after