what can effect?

sticking it in a blender

Amputation?

HAHAAHAHA! I nearly peed myself... *rears up blender*

Old Age...

insert Janet Reno joke from the 90's

A meat cleaver.

let me be the first one with a serious reply :D
I think smoking can restrain the growth of your penis just like it can restrain the growth of your whole body.

in that case, i'd hate to think what my lower body would look like if i DIDN'T smoke 40 marlboros a day.

the whole smoking-as-the-fount-of-all-social-and-medical-evil thing is so tired now

Death before puberty is over.
Chainsaws.
Polychlorinated biphenyls.
Getting caught cheating.
Lorena Bobbitt.

darn ... all the good one-liners have been taken.

/leaves.

that's never stopped you in the past

there ya go kid!
you heard it from Dr Rock
but he ain't no Dr Spock
:p

Not letting it learn it's lessons on it's own!

Studying biochemistry I do know that nicotine can actually restrain growth. :)
Not necessarily though ;)

yeah? well i study history; i don't believe all the tripe so-called "historians" write about it though.