Mine does it at home on the regular, so no benders. Just constantly wanting to use daily and then trying to quit when money runs out and then back on it as soon as he can get it etc. He is stuck in a cycle.
I have known other drug users who would go to crack houses… so I know what you mean about the benders.
It gives the person such a (brief) high… they just chase that especially if there are underlying issues such as previous trauma or mental health. For mine it is temporary escapism from his thoughts and emotional pain… but it is ultimately causing him more issues and pain… he just can’t see that properly. It is never the answer.
Unfortunately another factor is who the person hangs around and what dealers have their details. So even if someone is in prison and comes off it in there, when they come out, there may be lots of triggers or people trying to contact them/drag them back into that lifestyle. Mine has told me he is very triggered by alcohol. He also gets very stressed and automatically wants to use/smoke cigarettes and drink… it’s all interlinked.