Butyl rubber and EPDM (ethylene propylene diene monomer - a synthetic rubber) are the two best flexible liners for water garden construction. Each of these materials is UV stable and should last 20 years or more. EPDM and butyl rubber are generally available in 45 mil and 60- or 30-mil thicknesses, respectively.
human behavior. The capacity of mental, physical, emotional, and social activities experienced during the five stages of a human being's life-prenatal, infancy, childhood, adolescence, and adulthood.
Sexual activity and sexual behavior redirect here. For sexual activity among other animals, see Animal sexual behaviour. Human sexual activity, human sexual practice or human sexual behavior is the manner in which humans experience and express their sexuality. People engage in a variety of sexual acts from time to time, for a wide variety of reasons.