will sperm left around get someone in my house pregnant?

I don't know what the exact odds are, but I'm guessing near impossible. Imagine how many masturbating men and teenaged boys there are out there. If this was a problem, it would be a big problem and you would hear about it.

The bath/shower I think is a non-issue. It's so diluted and it washes away, just make sure to clean any off the walls or whatever, just for cleanliness sake. As for masturbating outside the shower, like at the computer, I think it would be a good idea to use a tissue or a sock or something. Again, for sanitary reasons. You don't want to get your "stuff" on the mouse and then someone in your family eat at the computer, for example. Gross. You would want the same courtesy, right?

If you wash your hands really well with soap before touching anything, it's not an issue. The soap should kill it and/or wash it away. As for getting pregnant, the sperm pretty much has to be inserted into the vagina for it to be able to find its way, especially when it's a small amount.

Thank you so much =D I've been so worried about this its unbeliavable