Hi. i read your post but wasn't able to reply there. I suggest starting off with perhaps something simple and easy to clean up, maybe a can or two of shaving cream/foam. If you have a bath, great, otherwise the shower will work. Hopefully there is a lock on the bathroom door lol that would help to prevent unexpected family walking in on you. Hopefully my suggestion helps a little.
The question is whether this has a lot to do with sexuality.
We are a lot of people here with a penchant for what others call "abnormal". If you enjoy wet or dirty clothes, you've come to the right place.
Tell us what interests you have.