Penis and testicles
Getting it up shouldn't get you down. Here's everything you need to know about erections. Straight up.
Not being able to get an erection is called Erectile Dysfunction (ED). It is common and in most cases can be treated.
Epididymitis, Hydrocele, Torsion and Varicocele are not a folk group, they're the more common non-cancerous testicle problems.
We tend to take peeing for granted. Something easy is described as 'a piece of piss'. But it's not such a simple business. Sometimes it happens when you don't want it to. Other times you can't go even when your bladder's bursting.
Peyronie's disease is a condition where your penis becomes more bent than usual.
Incontinence - leaking pee without meaning to - is a wee problem that can be treated, reports Danny Farthing.
Kieran Brennan had an NHS vasectomy in Scotland in March 2009. This is his post-vasectomy diary.