High erection quality only when jelqing

I’ve been jelqing on and off for about two years. I have noticed, however, that when I do not jelq for extended periods of time, I have a dramatically weakened erection quality. Before I started jelqing, I had great EQ. I have great EQ when I continue to jelq, but if I stop, EQ drops dramatically. This includes mostly an erection that goes away quickly and substantially less rigid. What could be causing this? Have I caused vessel damage?

Could it be that your overall fitness has declined?

It doesn’t seem so. I run almost every day.