Prostate health related question (using aneros without ejaculation)

Quick question. 

I heard that having prolonged ertion/ long term arosual without ejaculation will be bad for your prostate and potentially lead to inflamation. 

The reason I ask is because recently I have decided to give traditional jerking off an break. No touching the penis at all. Instead I will use aneros and nipple stimulation now and then (about two aneros sessions per week and multiple nipple sessions starting from friday night to monday morning). I do have very long and hard ertions during my sessions. 

I know aneros is suppose to improve your prostate health by massaging it.

So my question is does having aneros sessions counter the negative effects I get from all the 'long hard ertion' during my sessions ?

Thank you.