I've ran tren 3 times. Ran it once without test (my first time using tren) didnt run into sexual side effects at all. Ran it for 10 weeks at 300mg ew and finished it off with some winny. Not everyone is effected by it, but yeah I would use test just to be sure. I ran deca once alone and could barely get it up. Lots of sexual side effects; probably wont use deca again. And I dont really see myself using tren again either...too many side effects and I'm still lactacing once and a great while.