From my conversations with prisoners in various HMP establishments, one prepares a joint by using a Rizla cigarette paper, putting ordinary tobacco along its length, then 'skinning up', which involves scraping a lump of cannabis resin onto the tobacco. One then rolls up the cigarette, twists the end and it's ready to smoke.

Thus, there's nicotine from the tobacco in with the cannabis, and the smoke has the same effect on the lungs as ordinary cigarettes.

I'm not sure though how one uses a 'bong'. Does one put ordinary tobacco in with the 'skunk' or is it a different system?

I hasten to add that I deplore drug-taking and have seen the terrible effects of addiction, illegal activities such as burglary and theft, and of course incarceration in gaol. Drugs in HM prisons are absolutely rife.