While sexually transmitted infections like gonorrhoea and syphilis can cause men to witness symptoms that include an unusual discharge from their penis, there are other problems that can occur that aren't related to such conditions.
This is because there are physical issues that can affect the penis which can cause a man pain and discomfort, with one of these being a tear to the piece of skin that joins the foreskin to the head of the shaft - more commonly known as the banjo string.
Once this has happened, it's advised that you use a lubricant during sex to prevent the problem from reoccurring.
If your frenulum keeps tearing or doesn't heal properly then you may need an operation called a frenuloplasty.
This procedure works by lengthening the frenulum, which is designed to make sex more comfortable and reduce the risk of the skin tearing again. Men are advised to avoid having sex for six weeks after the operation.
In addition to the frenulum tearing, it is also possible for the penis to break, and this can happen if it is violently twisted when erect.
While there are no bones in the penis, such an incident occurs when a severe twist causes the tubes that fill with blood during an erection to burst.
Blood then pours out of the tubes into the other areas of the penis, resulting in a very painful swelling.
Penile fracture is rare, and it is though that about one-third of breakages are caused where a partner is on top during intercourse.
If you experience either of these problems then it is a sensible idea to seek medical advice to ensure you minimise the risk of further damage.