I have found that effect in AK-47 at about 10% amber.
If you harvest too early though it will enhance you distractability as well.
Let it go to 50% and good sex becomes "too much effort".
Have also been "stimulated" by White Widow.

'zat help?
Weezard
Weezard Reviewed by Weezard on . Just coming aboard Hi, I recently learned that use of a very small amount of mj could improve my erectile sensitivity during sex. Sensitivity has faded as I've gotten older. From other mj experience, I suspect that most, or at least much, of the mj available out there, will not provide this same benefit. I was told the mj I smoked (one large hit on a fatty on two separate occasions) was "very good stuff". Unfortunately, I was not able to get any more details on it and so I have no idea what the strain was. Rating: 5