Yep this is the prolactin. Interestingly and related, after males reach a climax during sex, our bodies are flooded with hormones including prolactin, that then responsible for the refractory period before we are ready to go again. There is a good chance that what you are feeling is an imbalance in your prolactin due to the Deca to test ratio. There is a group of new school steroid users that think running deca with low or no test is no problem but if you’ve been doing this long enough, you know that shit like this can happen. So first off, when you are running deca, make sure that your test is higher. So 300 deca, I’d run closer to 500 test. Next, you can also get some caber. Remember that this drug is very unstable. I would not get it from a research site. Compounding pharmacies don't even mess with making Caber. You have to get the pharma name brand. Your sides will probably start to get better over the next few weeks but as for now, you could use some caber at .5mg taken 2x wk. Best of luck brother