My brother and I pooped into a stranger's place.
That's crazy. Why were you in a stranger's place anyway?
Because it makes us both excited and we have fun doing it. We love it and get turned on from it.
It feels like you're doing something incestuous with your brother and I do not think that it is a healthy behavior with him and you, specially by trying to use a stranger's bathroom. I suggest you find someone else to spend time with in the bathroom and preferably do it inside your own house or theirs, instead of tresspassing.
I don't want to do it with anyone else though. My brother and I have so much fun together.
I understand that you and your brother are having fun, but incest is a serious matter and something that you should not do. Think about how your family would feel if they find out what the two of you are doing. If you are planning on doing any sexual activities, do it with someone else and do it in a place that is appropriate.