N.) Dog N Suds is the act of fucking a female in the ass, or vag. You then pull out, and proceed to bust-a-nut in her ass crack. After busting said nut, you lay your dick in between her ass cheeks. Once this is done you start lightly, or heavily running your dick through her crack, similar to titty fucking or such activities.

Vuahla, you have just committed a "Dog N Suds"

Running for exercise and picking up trash you find along the way. It's good for the body, mind, soul, and environment! Started in Sweden but is making its way to the U. S.