I Only Finish With Blowjobs

Hello, I am a man of 40 years. I have a girlfriend we live with. Everything in our relationship is normal. Sex is up to standard, there is nothing to complain about - we satisfy our fantasies, we do it often, everything is fine. For a long time now, however, I have noticed gradual changes in myself. It's getting harder and harder for me to cum when I penetrate. With vaginal penetration, I have not reached orgasm for several years. My girlfriend likes anal sex, but I have a hard time even when I fuck her from behind. Very difficult and very rare. I do not know what's going on. With other women I had been with before, the trend was beginning to show. I notice it from around 31-32, but now it is clearly clear. Each act necessarily ends with a whistle. My friend is good - she blows a lot and finishes me quickly and easily. But the contrast with penetration is huge. One is torment, sweat and great effort. And no chance to finish. In the end, everything becomes so easy. I also notice a change in what I like - the whistles gradually began to take over my brain. I look at my lips more and more, I began to insist on applying lipstick, to make up as whore as possible. My attraction to buttocks and tits is not the same - it disappears. I've never paid so much attention to a woman's manicure before, and now I'm waiting to see it on my penis. Crazy work. I'm far calmer when they give me a blowjob. I don't have to be careful when to take it out and whether it's too late or too early. The stimulation is far stronger. The very rubbing, the very energetic action of the woman's hand and lips are unattainable during vaginal penetration. To see her kneeling in front of you and cum in her mouth .... Penetration simply cannot be compared. I don't know how far I will go in a few years. I don't know if this is normal. I shared. I hope you have a nice day!