Never had Deca dick but I had serious Tren dick.
I brought a girl over for a one night stand and she was so horny and my damn dick would not work and I couldn't ejaculate either. My body hates progestins..... but Tren more so than anything. But I gain muscle like crazy on it....
So it's a hard decision to make. Do I want to be physically beast like for 12 weeks but unable to have any sex or slightly less beast like and be able to pump for 2 hours on Test. Hmmmmm......
Sorry Tren, never again.