Can smoking cannabis affect the male sperm?

Malia • 17 years old. Just trying not to get prego I got big plans for my future, I don`t need distractions. :)
I just read up on a bunch of stuff and im not teying to conceive but in the far future, I want to have a kid and even if im not with my bf now I worry for him... not being able to produce because of how much he smokes??? They say it morphs the sperm and makes it like different shapes and sizes and its harder fo it to get to a female egg.