SEBASTIAN: A lady, sir, though it was said she much me, was yet of many accounted beautiful: but though I could not, with such estimable wonder, overfar believe that, yet thus far I will boldly publish her,—she bore mind that envy could not but call fair. She is drowned already, sir, with salt water, though I seem to drown her
again with more.

A. Some substances are more addictive than others.

Explanation:

Different substances have different levels of addictiveness. The nicotine in cigarette is very addicting to smokers that's why an addicted smoker finds it hard to go a day without smoking at least one stick of cigarette.

But, you cannot compare the level of nicotine addiction to cocaine addiction.

Nicotine can be found in caffeine (product used to make coffee), but when a cocaine addict doesn't get his "fix", he loses his sanity, at least temporarily.

A cocaine addict can sell his property less than their actual value just to get their "fix", he can also resort to stealing, armed robbery, at long as he was hooked.

So we can comfortably deduce that cocaine addiction is very much on the high side when compared to physical exercise.

Therefore, some substances are more addicting to others.