I found your website on frenulum breve and I wonder if this is what I have. Most men don't ever get the chance to compare erect willies, so it's difficult to decide when yours is different from what you're supposed to have. My foreskin is quite long, and will easily cover my glans while erect. I can also pull it back when flaccid or erect and it will sit behind the glans except for where the frenulum is. However, when I'm erect, the frenulum itself, where it's attached to the glans, turns white as the blood is forced out of it by the tension, and the feeling can be uncomfortable or actually painful. Is this the sort of thing you're talking about?