Ssrious question : how likely is it for someone to use meth if their S/O does it

I guess thsir is no answer ? I mean , while a person is more likely to use these kinds of substances if someone very close to them uses them, I'm sure many of you have had close relationship ships with strippers who have used coke or meth(I know I just put the 2 drugs in the same category.) But haven't used these substances yourselves? Thx