How to EAT ASS

This is not what you think lol. I don’t want to know how to do it, I want to know how to tell/encourage the boys eating my ass to do it a little better.. I think out of … I don’t know hundreds of people who ate my ass, only 2 made it to where I didn’t want them to stop. To be fair, the last one seemed to have a strong long tongue, if that matters, but he was actually getting some penetration, it was great. But I found out that getting your ass ate can be quite boring after like 4 min, if all it is licking the rim. And even if you are just relaxing, and he wants to do like 10-30 min, it can actually get sore! So is there some kind of real technique, or does it just have to do with the tongue being able to penetrate the hole?