why can't I maintain and struggle to get a hard on?

If you are in good physical health, the problem you have maintaining an erection is likely mental. I have found that relaxing and becoming comfortable with my partner helps me maintain an erection. That may mean taking your time so you feel really comfortable with her. Maybe even laying naked together with no anticipation of having sex.

I have never had my foreskin bleed. You can always use a lubricant. My wife and I keep some handy in my night stand drawer.

I dont understand what your weight means.

Have you consulted with a doctor? If you are in good health the doctor may prescribe you Viagra or something similar. It helps to get an erection much easier. I used to get nervous with a new woman and would lose my erection. Then I started taking Viagra the first few times we had sex to help me overcome the hurdle.
Also, you may want to start masturbating some if you dont already. It helps get the cob webs out and builds confidence that you can do it!

hi again
thanks 4 your answer.
I just checked and found that 13st in American pounds is equal to 182 pounds.
a few years ago I was almost 200 pounds and I felt and looked terrible...and all because I decided to eat more than i needed to...because I could and I was being greedy and paid for it by putting on more weight than my body needed.
I have not been the same since...I started off slim but got really fat...anyway back to the question @ hand.
thanks for your suggestion but I have decided to lay off masturbating although i used to do it often.
I know that if i want to i can turn myself on and play with myself but I'm tired of doing that i would rather learn to do it the natural way like you do with your wife.
I don't think I'm scared of sex itself or women...I think perhaps I just want to be perfect and I get so anxious and excited all @ the same time and then when my P doesn't react I feel so embarrassed and frustrated.
I don't want to resort to using Viagra...I shouldn't have to use it...my P should respond and I want to keep trying until it works the natural way...it must work...I have been to my doctor about this problem many times and to show how naive I am I used to think that a bone was broken in my P which is why it wouldn't get erect!!!
feel free to laugh!!!
could be an age thing?
I'm 45...but I'm not that sexually experienced believe it or not...I started dating later than most guys do basically cause i was always so shy and nervous...my heart longed for a girlfriend but I felt too nervous to cope with having one.
well it turns out i was wrong...i could and did cope once i started dating...I could even be married now but i suddenly changed my mind and broke off the relationship...then years later I met a woman i truly fell hook line and sinker for and she left me ;0(
man that hurt big time...it still does to be honest but i have accepted now
but if she ever came back i would take her back.

Some people have tight foreskin, which makes p to bleed when the skin slips over the head. This can be easily cured by a very minor surgery. Consult your doctor.
As far as errection is concerned is it only when you try to insert into v? Do you get full erection when you mastrubate? If yes you have performance fobia. Assure yourself that you can. You will succeed if you do not have any other illness like diabetes etc

Hey man, I had your same problem a while back, but I found this neat site and found a lot of products to help me. The problem is actually in your brain, certain receptors are not being replenished and are therefore contributing to your issues. Do you have trouble concentrating as well? Do you have brain fog?