Depends on the dress code...but DH would wear a tie anyway probably, he likes getting dressed up and so do I. I always say, if you can't get dressed up to a wedding then what can you get dressed up for? We went to a very formal wedding in the Melbourne Cathedral not so long ago and there was someone in jeans - and yep, I remember that! I think you need to follow the dress code, if it says formal and you turn up in jeans then that is being disrespectful to the bride and groom, I would be majorly peed off if someone had turned up in jeans to our wedding, ours was formal. I think, in part, you dress for yourself, but you also need to dress for the hosts/occasion, etc, as you have been invited as a guest and to say that you won't wear something when it states that that is the dress code then if you can't make the effort then maybe you just shouldn't go.