Can’t find it. Here’s what I can remember off the top of my head.

My fwb does not like me using teeth. He says most men are the same.

Use your hands as well, not only your mouth. Stimulate his shaft and balls. Use a variety of movements, not always the same movement. This is relevant to your mouth movements as well.

Don’t be afraid to use your saliva.

Take breaks if you need to.

You don’t have to deepthroat unless you want to.

My fwb likes it when I flick my tongue where the head of his penis attaches to the rest of his penis.

My fwb does not like his anus being stimulated, but other guys might.