Yes, marijuana, alcohol abuse, cigarettes and some drugs can effect not only your sperm count but also the health (motility) of the sperm.
Probably not, because I think it affects mostly the mind.
Smoking weed has no bearing on how "strong" a mans sperm is.
Smoking weed, smoking weed, and smoking weed
There is no stats to support that smoking weed will stop you from conceiving. It's not a form of contraception. It's rumored to effect your sperm count, but this will still allow contraception.
I think the following story will help you http://sites.google.com/site/stopweed/ i might weed lowers your sperm count
smoking weed does not affect your period, smoking grass might however
Weed is actually healthy for you, google the benefits
No you can not get skinnier from smoking weed
smoking what? weed? or ciggs?
No, a man can have a baby with or without smoking weed.
cuz you been smoking to much try to stop for a week and then smoke again your system will decrease and you will feel high again
No but weed does
Of course. Weed is not a contraceptive.