@jaygk I never had to wear a catheter.

I never had ED. There are data showing that the risk of late ED can be minimized by avoiding radiation hitting the penile bulb.

Since they radiate the entire prostate, being bilateral isn’t significant. However, depending on where the lesions are in your prostate, (based on the FLAME protocol) a boosted radiation dose can be administered where it’s needed, and less where it might not be needed. (My oldest brother recently had 28 IMRT sessions using the FLAME protocol, where at each session, three different Grays of radiation were administered, more Grays to areas of concern, thereby minimizing certain risks near areas of less concern.)