I know the type. We're not all like that though, I know plenty of people who use it very sparingly. Personally I'd never have more than a toke every second week or so, it's really only a reset for my mind and it does that job better than anything else. I use to do a lot more when I was living with my ex because as already stated here it's great for sex, but getting blown every time your gonna fuck can really take a lot out you mentally and physically. Not her though, as far as I know she's still soldiering on.
That's the long winded way of saying some people can control it, some people can't. Maybe a lot of it is down to a body's tolerance, same way that hangovers could be considered a good prevention for alcoholism