Serious answers only: I'am 21 years old male and I have too many erections !

You have a very healthy sexual body make up, lucky you are because others are really struggling on their diminished erection problem.
Don't suppress it, just let it go because this will slowly subside as you age in time. All you need to do is just wear an underpants that can restrain the bulge of your jr to keep you away of embarrassment from other people who are looking at you jr peeping around.
Seriously, this is a normal sexual reaction when you can be highly sensitive to some degree of arousal triggers be it from touch of your gf, looks of a very sexy -hot woman, or even by just the smell that comes from your girl. All these but just a normal reaction of your sexuality that generally comes at young age where psychologically still searching the adventures of its pleasure, and self question of what it really feels like?

Erections are good. Be happy till they last.

To think about your grandma is disgusting. You could have more in your head by now.

You can masturbate or have sex. That will help, but not 100%.
Every teenager faces the same problem. Live with it.

When you grow up you will be crying and wanting to have this problem.

either masterbate or tell her about it.. When i was in school with my girlfriend we would have a fun little number system.. If i was getting hard, i would randomly just tell her 4.. if i was hard,, i would say 5.. ahah, she would usually laugh, or love the fact that she turns me on.. haha..

sometimes she would help me get rid of the erection by saying gross things, like mentioniong peoples names that are not attractive, etc.. aahha..

like the comment above. if you want to be less horny, just masterbate.. or fool around with your girlfriend! (safely of coarse )

Well you have two options. You can either start to masturbate a lot (like right before you see your gf) or you can just get an uglier gf haha.

This link could help with your thoughts for decresing your erection: http://www.google.com/images?um=1&hl=en&biw=1280&bih=616&tbs=isch%3A1&sa=1&q=infectious+skin+disease+gangreen&aq=f&aqi=&aql=&oq=

i think u have nt been in any kinda physical relationship
have some love wid her
and try to be frank n funnt wid him take things like sex naturally
and i hope u r truly in live wid her than
u can even loose ur virginity to her
think like man, man
go rocking and confident to her

You are obviously very attracted to your girlfriend. Perhaps if you guys aren't doing anything together, you should masturbate it out.

You could try masturbating before you see her, lol. You're 21, so right now your body is at its sexual peak. This will probably go away as you get older.

Your mind is thinking about it and then it happens. You need to think about other things, which will happen when you finally have sex with her. You need to this load off your chest. oops.( shoulders perhaps?)

I think you might be a sex addict! You prob should go see a psychologist or someone to help you with this problem!

What is happening to you is perfectly normal and under no circumstances should you consider taking any action that is intended to stop you from getting an erection --- as such devices and drugs are extremely dangerous. You should be pleased that you are able to get spontaneous erections in public as this shows that you have a high sex drive. When you get around to losing your virginity, you will probably find that you get fewer erections in public as virgins have overly high expectations of what sexual intercourse is going to feel like. Having said that, I would also advise you to remain a virgin until you know you are ready to lose it --- do not lose it for the simple sake of losing it or as an attempt to stop getting erections in public. I assume that your girlfriend is also a virgin. Before you allow her to take your virginity, both of you should have a blood test to ensure that you are not carrying diseases that you could give to each other. Congratulations on being a 21 year old virgin --- you are very wise --- 22 years is a good age at which a boy loses his virginity but only if he knows that he is ready.