Hello, Normally erectile dysfunction in middle age is generally due to causes like  overwork, stress, guilt and bereavement (ED often happens when a widowed man tries to form a new sexual relationship),diabetes,hypertension,obesity,heavy alcoholism,smoking,use of recreational drugs etc. But a erectile dysfunction at such a young age is most likely the result of anxiety – particularly nervousness about having sex, about causing a pregnancy or about using a condom. A lot of men in this age group complain that they can t get on with a condom because as soon as they try to put it on, they lose their hardness. This is called as have condom collapse syndrome . Other common psychological causes of erection difficulties include: About performance related guilt – notably if you re trying to have sex with somebody else s wife relationship problems – especially if you re no longer keen on your partner latent gayness – for instance, if you’re a basically gay guy, trying to have sex with a woman depression exhaustion. In a lot of cases, ED turns out to be due to a mixture of psychological and physical causes. My advise to you is simply relax,do regular aerobic exercises,go for mental relaxation techniques like deep breathing exercises,pranayama and yoga,quitting smoking and recreational drugs and reduce alcohol,if taking. This in itself should make you all right in next couple of months. However if you don t find improvement,consult a doctor and/or a counsellor. Thanks