I get off to blogs such as yours and the thought of my girlfriend fucking bigger cock that nothing else gets me as hard but I don’t know if I can go through with telling her is this normal for most men and what should I do

Yes … very normal … you can try giving her a couple of books to read … or a hot cuckold hotwife DVD … maybe something where the wife is “taken” while the husband is forced to watch and then he gets hard and she starts cumming all over those strange, bigger, better cocks … or you can just write her an email … but makes sure she’s had some wine and your licking her pussy before and while she’s reading it … you don’t want a “yes” you are just looking for not a no … good luck !!!