Hoss, when you start to masturbate at your computer, do you find yourself getting nervous, maybe even your heart racing a bit and stomach muscles tightening up, as you start worrying why your dick isn't getting hard? If that's the case, I think you're dealing with performance anxiety. I know it sounds absurd, but you can have anxiety even when just masturbating by yourself.
Let me tell you a story ...
I'm 37, myself. About 7 years ago, I had a bout of what's called Peyronie's, where you get an injury to the penis that causes internal scar tissue and your dick bends. Luckily, my case fairly well resolved, but it left me with a head that doesn't get as hard as it used to. My Uro gave me Viagra to help really get great boners and I loved it! I never had to worry about my dick getting softer while giving oral and I could recover and have sex again maybe ten minutes after cumming - I loved it.
Then, I started a serious relationhip with the girl I'm with now. She's hot and loves to have sex. But one day I started thinking, "I wonder if I'm dependant on Viagra now?" So, one day we had an opportunity for some quickie sex and I didn't pop any V. I should also add that I'd masturbated that morning, so I'd already popped once that day. Well, we started fooling around, she started blowing me and nothing! I started to panic, and then panic some more. I had to masturbate pretty hard to get it up and then we had sex. I can tell you, that single event traumatized me. It was so emberassing, it hurt like hell to even think about.
Then you know what ... the Viagra seemed like it wasn't working right anymore. It would take stroking or oral to get hard, whereas before, I'd be hard from hugging. You see where this is going? I believe I was so freaked out by one incident of ED that my brain started overriding even the Viagra. I was freaking out thinking now even Viagra doesn't work!
I made my Uro run a Testosterone test. It came bacl 235, which is very low, yet the Uro (and this is not uncommon) sluffed it off. Many - make that most - doctors don't know a damn thing about male hormones, even some endocrinologists. Men should be in the upper third of the so called "normal" range to truly be healthy - that means a score of anywhere from 500-800 is optimal. You really need to find a male hormorne expert and not take that bullshit that your results are "normal". Most docs think if it's within the normal range, your good. That simply could not be farther from the truth. I myself am going to see a hormone specialist next month, as I want to get my testosterone right, once and for all.
But back to my original point ... performance anxiety is a bitch to kick. I'm still dealing with it a year later. Virtually every time I'm with my girl and we start having sex, if I'm not getting a little hard just from the kissing, etc., I start mentally freaking out ... and then if she starts blowing me and it's not instantly getting hard, I start freaking out some more. Nerves and adrenaline are deadly to an erection.
When I'm worried about my dick and thinking I'm having troubles, I can start masturbating and find I'm nervous, anxious and even tense trying to get it up thinking, "damn, I hope this works right or I'm going to freak out." That's a bone killer.
I would ask you a couple questions: Do you get night time erections and wake-up erections in the morning? If you do, you probably are dealing with performance anxiety, because nocturnal erections are telling you your dick is working fine.
If you don't, or have noticed a drop off in these in recent years, you really need to find a hormone specialist to discuss Testosterone therapy, which might change your life (I hope it will mine).
All these things get interwoven ... a little physical issue get's in our head, then it becomes a mental thing too ...
I can't tell you how to get past the anxiety, as I'm wrestling with that myself, but you should definitely get your hormones checked by an expert. This may be the key, my friend.
Above all, good luck,
Eisenhower