^^ Perfect.

You would have to smoke quite a bit of opium on a regular basis. Say, 2+ times a week for a month or two. But, it would be like a snowball effect, where you don't stick with a schedule of 2x/week every week for 8 weeks and then...BAM..you're addicted.

Instead, you would start out doing it 2x per week for a week or two, then 3-5 times a week, then every day, then multiple times per day because you are actively trying to keep the buzz going. That's how you get addicted. Same way as with any drug such as alcohol or tobacco.

The key thing about developing an addiction is that you don't realize you are becoming addicted until it's too late. I've seen that happen firsthand with both legal and illegal drugs, including myself (not with any opiates, thank God).

Having said all that, you'll have a fucking BLAST smoking weed and opium, OMFG. Just don't make opium part of your routine.