hi i think you have two things going on one is your hpb meds they will do that to your erections but in one way your lucky to be getting erections as hpb meds are sex killers. i think you other problem is coming from masturbating you are using a strong grip this is why you feel no sensations. i think you may need to reboot your penis the way to this is take an 8 week break from all sexual contact and masturbating this will give your penis a chance to get better and help heal itself. when you have done the 8 weeks try masturbating with an oiled penis and only use a featherlight touch just as a vagina would given time things will get better. google natural ways of hpb your find ways of doing this get that working and you should be able to wain yourself off the drugs then that would be a other problem out of the way. hope this helps you. good luck
when we start intercourse the stimulation is not enough to maintain an erection. . i can still achieve orgasm through masturbation. i have high blood pressure and take enalipril maleate.