I’m not a doctor and I don’t even play one on TV but there’s definitely medical conditions that affect your ability to orgasm – ‘anorgasmia’ is the technical term.
If you’re really fucked up, like I am, you might even set up a blog just for you precious little princesses who are unable to cum, even if you want to…
http://brand-new-in-box.tumblr.com/ (run by an anorgasmic friend now) with some fantastic captions and thoughts on it. So hot, even if you can cum…
Maybe it’s not a ‘condition’ maybe it’s a blessing…
However, assuming you don’t want to go down that twisted path (you do, you do) there are many many factors that can prevent you cumming, emotional, mental, physical. Most of them pretty easily fixed…I’ll leave WebMD to take over now: