Single-speed... I just don't get it

Dude! Easy! I apologize that my lack of propper grammer offends you so and I thank god you have never had the misfortune to have your chain slip or had to ride a bike with a shite derailer and try to fix the problem because you cant afford a new one and yes I know about turning the l hand and r hand screws but as I said shite derailer

I edited because of my appalling grammar in my response that I wrote, mainly because I am a bit of a tit when it comes to English.

I am a student mate, I remember once had to ride my old Marin Bearwoods (needing a new chainring) til payday at Tesco. I lost count of the number of times the chain came off. However I don't blame that on the bike being geared, I blame that on me not properly maintaining the bike in the first place and spending too much money on San Miguel down the student union.