There are several causes for this. If you swim a lot this will shrink the penis size temporarily (anything cold does.) Stress, emotional problems that have not been resolved can also do this.
I strongly suggest you get a check-up by your doctor. He will check for blood flow, and also give you a blood test for Diabetes. I highly doubt you have diabetes at all, but it wouldn't hurt to get it checked out.
Usually young men of your age, it could be due to shyness, fearful of performance, how your parents brought you up about sex (guilty conscience) you are on steroids, if you are athletically inclined. I think you would feel much better getting a physical check-up by your doctor and it would put your mind at rest.
I would also recommend a blood test for your Testosterone levels. While 30 is very young for the drop to start, It is possible. Failure to achieve an erection or failure to maintain an erection is a text book example of Low Testosterone.
If all tests come back A-OK (I sure hope they do) then I would say it is emotional. Talk things out with a good friend. This helps a lot. Don't forget to see that doc of yours.
One of the commonly faced problem by men is erectile dysfunction but levitra (vardenafil) or Cialis and of course Viagra are all common prescription medicines for treating this problem.
If it was me I'd talk to a doctor. There are treatments for this sort of thing, but you can't get them here.
His penis was erect.
To erect a building means to build or put up a building. An erection however generally refers to a stiff (erect) penis
No, the word 'erect' is a verb (erect, erects, erecting, erecting) and an adjective.The noun forms of the verb to erect are erection and the gerund, erecting.The noun form of the adjective erect is erectness.
virtual, erect and diminished
Convex mirror
this might mean that you are not having a full erection. if you want to have a full erection you need to have stimulus. it might also be the fact that you might not be fully finished with puberty and may need some time to grow before you have "full" erections
Virtual Erect Diminished
concave lens formed virtual,erect and diminished image irrespective to the distance between the object and lens.
it means someone is making someone get a boner. (when the penis is erect)
The image formed by the convex mirror is virtual, erect and diminished.
an erection is when the penis becomes hard and erect, where ejaculating is the release of semen, ejaculating is also known as "cum" or "come". an erection is also known as a "hard-on", "stiffy", "boner