If you want a short answer, then the answer is yes; occasional erection failure is normal.
When it happens once or twice, it is nothing more than a thing that happens to most men; it's a failure which comes from too much alcohol, or a lack of sleep, stress, exhaustion; the stuff of a hectic modern lifestyle where the benchmark of 'success' is set way higher than any generation before. This is nothing to worry about; paying some more attention to your lifestyle normally sorts it out.
However, worrying about it can set the scene for a more persistent problem, a "fear of failure". I have seen many men in my clinic who are caught in a bind; they worry about not being able to, which becomes the source of not being able to.
When does erection failure become a problem?
A more detailed answer is this, taken from the NHS website
"It’s estimated that one in 10 men has a problem related to having sex, such as premature ejaculation or erectile dysfunction. Sexual dysfunction in a man is when he's not able to perform properly. The main problem is being unable to get an erection. It’s much more common than people realise. In the 20-40 age group it affects around 7-8% of men, in the 40-50 age group it affects 11%. In the over-60s it affects 40%, and more than half of men over 70.” (Dr John Tomlinson of The Sexual Advice Association)
If you are suffering with recurrent, on-going problems with erectile dysfunction, then don't sit at home worrying about it. Seek help now, call your doctor and get a physical check-up. erectile dysfunction can be a symptom of something very serious, the type of serious that is trying to kill you. When your doctor tells you it is all about the things going around in your head, then call me, and together we can sort it out.
Start a conversation with me, start a change in you.