Yeah, not surprised. What I want you and Shinji to try next time is to make sure he gets you erect and keep you that way at first. Tell him to use a little lube on his fingers first and get your anus warmed up before he puts more on himself and pushes into you. Kiss and touch each other a lot. Tell him which touches feel good, better than the others.

That should help, and if you explore your body a little more beforehand, you might have a better idea. It doesn't hurt to pick a setting the two of you think is romantic.

[a pause]

And an exhibitionist likes to be watched having sex. You have no idea about kinks, do you?