Lots of thing affect our erections and erection quality.
1. Stress in our lifes, stress can be either positive or negative: example: upcoming wedding, raise at work, promotion at work, girlfried/wife pregnant. Negative: Financial difficulties, death of loved one, relationship problems,. Stress levels will impact quality of erection.
2. Need to be careful with Deca. Deca can increase prolactin in the body. Prolactin is released when u ejaculate and brings you from rock hard boner back to mr limpy. You are not on a high dose of deca, so I wouldn't suspect you are having prolactin probelms, but only a blood test would confirm if you are. Most guys with a higher test dose than their deca dose don't have a problem with erections for the most part. U have to remember in this game thou, that every person is different. Everyones chemistry is different in how they will respond or not respond to a chemical introduced into the body. You can use Pramipexole to lower high prolactin levels. There are a few other drugs to bring prolactin under control as well.
3. From my own personal experience, the same thing happens to me on my cycles. I'm a raging boner first couple of weeks, then at some point into the cycle, quality of boner is not the same. My own personal theory is at this point on cycle, I've totally stoped almost all natural testosterne production from my testes. At this point they are substantially smaller than normal. I personally have used Human Chronic Gonotrophin, HCG to restart the boys with some natural test.
4. In my current cycle, i'm using masteron with test, and have had positive results with the boner department. If your worried about taking the skin off mr. happy because of excessive use, their is a problem. My personal theory behind this combo: Test, and Masteron is that your getting both types of testosterone the body needs. Masteron is a DHT, dyhydrotestosterone. Oral Proviron is also a DHT derivative. Proviron is also known to lower estrogen, increase free testosterone levels as well. Less test is bound, and more free test to work magic in the body.
5. High Estrogen levels: High body fat. If you have high body fat, your system is much more efficient at converting test into estrogen. This is why most AAS users will tell you to get down to lower body fat levels before using AAS. Best way to know is have blood work done.
Can't afford blood work, consider amt of water retention, mood swings, irratability, excessive abd fat accumilation, Symptoms of gyno. ( sounds just like PMS for women). Lots of drugs to counter high estrogen: aromisin, letro, and a few others. Depending on your age, size, and experience I would say that on 1200 mg test a week, you should already be taking an AI starting in at least week 3 of your cycle.
6. If your in the Bodybuilding/AAS life style, since its your third cycle, i assume you are, I would recommend considering keeping some viagra and cialis on hand. I'd rather have it on hand, and not need it, than need it, and not have it on hand. V= up to 24 hrs, C= up to 36 hrs.
7. In men, the most common symptoms of hyperprolactinaemia are decreased libido, erectile dysfunction, infertility and gynaecomastia.
You have alot of guys on here with alot of experience on this subject. Guys please chime in.