How do you shag someone hard?

First you have to gently begin to kiss passionately then begin to undress rubbing penis's and pussys would work a treat. Then start by gently pushing the penis in and out of the vagina. Progressively get faster until you feel you can push no more and keep that fast pace going for as long as you can hold it. When you get tired out, let your partner know then gently slow down. After finishing, fall into one another and kiss and carress and rub each other. When you have caught your breath, begin again and continue for as long as possible to maximise pleasure and chance of cumming. If you do cum, congratulations. You will know because liquid from the penis will ooze into the vagina giving a wonderful feeling.