My condom keep falling off....

There is no standard length for condoms, but ones made from latex rubber should stretch to fit the length of a man's erect penis. Condom widths can vary; there is about a 1.5 cm difference between the smallest and largest condom. A condom that is too small and tight may tear, and one that is too big may be more likely to slip off. You may have to experiment to find one that works for you.

Smaller, %%u2018closer%%u2019 fit condoms are typically labeled trim or snug fit. You may find larger condoms labeled as XL, XXL or Magnum. Avanti brand condoms tend to be the largest and least tight. Just a pointer: you may find the greatest selection of condoms, in both style and size, on the Internet (rather than in stores).

forget buying the magnums and stick with the pee-wee brand.

Well, I know they have different sizes I always required a large but you may have a small dick and are using a large size try switching to a small and see if this takes care of the problem.

you need the micropenis size

Buy a different brand or try a different size.

You just have a very small penis. Nothing wrong with that, you just need to invest in some plastic zip ties. Problem solved.

use a ziplock bag

LOL @ cab. He's right. Condoms don't come in different sizes. You can stretch a condom over your head:

http://www.metacafe.com/watch/268159/guy_puts_condom_over_his_head/

Try a different brand

hahhhaa you have a tiny penis!