Be sure that your relationship is well established first... In my situation it took 20 years and two children later. At some point , when you feel that the time has come to reveal your inner feelings, just go ahead and ask. The worst your partner can say, is 'No'. In my case, my wife was reluctant because she did not want to 'hurt' me and I had to assure her that the pleasure of the experience transcended the possible pain that might be involved. Sometime later, she presented me with her shaved genitals and said that she would like to receive oral sex .... I had no idea up until then, but how could I refuse?. Hey, we are all in this together and there is no rule book ... we make up the rules as we go along.