sounds like a possibility for sure!If you want an alternative view, I believe its penis atrophy. Consider this, from when guys are about 13 years old, for decades their dicks are hard for hours a day. Just about every guy is masturbating or at least rock hard when a good stiff breeze blows by. Heck, in my teens and 20's I would wake up several times each and every night with a rock-hard penis. This exercises the vaso vessels in the penis thoroughly and very often. As we get older, busy with a career, waiting for wives, girlfriends, and partners that are "once a week", or too busy and just put out for a sexual workout....the penises don't get the workout they used to. Dicks atrophy, it's a fact. In short, I don't believe it's the added testosterone, you all are making an association that I don't believe is there. My recommendation is to take arginine, citrulline, daily 5mg Cialis, and start banging or jerking away or get a vacuum cylinder that you can use for at least an hour a day. You can retrain and get back most of it.
I'll give you another example. When I was in 10th grade, I broke my wrist. Back in those days they only did hard casts. That horrible sweaty cast was on me for six weeks without a break. When I got my arm back, it was pale, weak, much smaller, and looked like an old man's arm. It took months for it to look normal. That's just in six weeks. How long are you all going without daily action, the sort of daily erections that you had in your teens and 20's??
In short, get cranking, use it or lose it.