I am relatively young. 24 y.o. male. I am not sure if I have to be concerned about my erectile function. I have quit watching porn a year ago. I am having regular sex nearly 2 yrs now. Road was rocky since beginning. The very first three times I had sex my penis couldn't function. It was psychological - shy, insecure. (even though normally I'm opposite). Then erectile function was working properly. Or I just think so. That's why I created this post. After couple months, I got a hang of it. But my penis kept getting limp midway. I even went to the doctor, but a casual, talk with a doctor seemed to fix everything. It was working normally. However since the beginning I had what me and my partner jokingly call weak erection. Weak not in actual hardness, but in a means of duration(and with it hardness). Don't get me wrong. Most of the time my penis works fine, I have no problems with it. For example, I can get 9/10 erection in the first minute of kissing/foreplay. later without stimulation it just dies. But I strongly believe this is common. No stimulation = no erection. This is fine. A good blowjob, sets me just fine. In these years I found out lots of things. If I do not get reaction from my partner (moaning) I couldn't get myself up with a hand, but if I see pleasure in her, I get aroused way more, and I get erect with my/her hand just fine then. I strongly believe this is common.

I am quite insensitive down there. My gf was surprised, when she found out, I dont feel much when she plays with my nipples, balls or part from balls to anus. Overall, I am VERY dom'ish partner. I have very sub'ish partner. We are both very kinky. Combination works flawlessly. I've seen videos. Where guy gets a handjob, and cums in 5-10 mins. They moan from pleasure. For me cumming from handjob alone is impossible, alone it doesn't even feel good. Combined with blowjob it does, if done correctly (also fast paced). Talking about blowjob. A great blowjob must include deepthroat. Regular blowjob just doesn't feel good for me. I mentioned, that I am very kinky and domish, most likely it is psychological. However even deepthroats can be good and bad. In the beginning I though it is impossible to cum from blowjob alone, it is possible, but I have to agree, it takes lot of effort. But it is possible. I love fast paced sex. Maybe because it just feels better for me. I can last long, sex always takes around just short of an hour, or more. Rarely less. We don't use condoms.(I researched/tried lots of different condoms). However, I loose erection quite fast if there is no stimulation (15-20 seconds), beginning, halfway sex. Doesn't matter. In the end it gets even harder to maintain it. Some less stimulating positions can lead to loss of erection. Second round is impossible. I read that for my age common refractory period is around 15-45 mins. Today we had sex. And after 4 hours we went for round 2. Since beginning (blowjob) I felt my erection wasn't quite normal. Dominant positions, where I control pace, depth works okay, but I get tired doing physical work, until I have to catch my breath, and sweat runs of me.(I already know how tiredness effects my erection) At that point, tiredness takes toll on my erection, even switching positions is hard. Cause I can get limp. And other positions just doesn't stimulate me enough for second round, gf was riding me and I lost it(if we could call it a second). (it was without a condom, with condom I would feel absolutely 0, and it is not possible, tried many times).

Even on normal day. I cannot get my erection back up using just hand. it just doesn't work. However this changes if I visibly see or hear pleasure of my partner.

Don't get me wrong. I have high libido. If I take day or two off. Everything is fine. Erection period (time) still could be longer, I and my gf know that I don't have great erection (I've seen videos of guys eating, fingering girls and maintaining erection, walking of camera for a minute, and walking back with a hard on, for me it is impossible, No stimulation = quick loss of it) but overall I work fine. I can go even with condom from start to finish with absolutely no problem. I wouldn't be concerned in my 30s or 40s. But I'm 24 yrs old. Not sure if I need to seek additional treatment/help. How hard it is to maintain erection for you guys?

P.S. my morning wood is always 10/10 and can last up to couple or 5 minutes. We always joke, why can't it be like this when we have sex.

TLDR; 24yrs. Insensitive pp, hard to maintain erect pp, no stimulation (15-20 sec) - erection lost, second round after 3-4 hours very troublesome. How long do you guys maintain erection while having sex, when stimulation is gone? Is it hard to get yourself back up just with hand?