What makes for a good rimming?

[anr70]

My boyfriend likes to be rimmed/have a finger in. Any men here that can tell me what feels best, what to do with my finger once it's in? An idiots guide would be great

Look up how to find the prostate or prostate massage.

What about a butt plug?

Enthusiasm

Wear latex or non latex medical examination gloves. It's often a turn on for him you can lose any ick factor.

A tyre lever will protect your fingers from being pinched

Bad Dragon range are excellent, and lube is essential