I've read that a lot of people have problems with erectile dysfunction and loss of libido after taking nandrolone and trenbolone...

This causes a decrease in dopamine levels and increased stress transmitters (norepinephrine, Epinephrine)

Therefore it is necessary to reestablish neurotransmitters back into balance.
Dbol is the only anabolic steroid, which is an antagonist of dopamine.
By using a 10-mg daily dbol starts to raise the level of dopamine and erection will gradually return. This is a trick.

Long years for many men without erection and libido were unnecessary when it's so simple.