hi,
I am a 39 year old male marrid for the last 10 years.What you have said about your husband disliking oral sex with you now does not sound as strange to me.In my opinion,sex [in your case,oral sex]is like many other things in life which we lose interest in time and again.But it is not permanent..oral sex is perhaps most intimate part of sex between the two partners,and though he may not find it very passionate today,he will certainly come back to enjoying it.It happens with me too..Though I am very mad of doing oral on my wife[which she never has been doing on me],sometimes I just desist.For humble suggestion,you would be knowing whether he likes it shaven or hairy..keep it in the position he generally likes[anyway,for oral better if you keep it shaven],just wash it properly before coming to bed and let her feel that you have washed it..you may use some light perfume or deodorant or aftershave..you may suggest starting your foreplay with licking i.e.before you are all wet..