Increased sex drive

I am shocked but zoloft has actually increased my sex drive and I woke up with morning wood for the first time in years. My only explanation is that for years i abused opiates and kratom. During that time I had a drastically reduced sex drive. I feel like opiates affect that so much more than SSRIs. I was so scared it would be the same but it doesn't even come close to the impact that opiates had on my manhood.