I’ve never heard of the  Journal of Sexual Medicine.

Now, LiveScience reports on a study published in that journal showing that

male [pot] smokers could be courting sexual dysfunction

and notes that previous studies determining that

marijuana extended the duration of sex may just have been experiencing the drug’s altering effects on the perception of time.

I don’t know if the latter observation will be perceived as a problem by a lot of people.

Anyway, this is all the subject of ongoing research, it seems. Unfortunately, the article omits noting the well-known fact that smoking tobacco has a very negative effect on sexual function.