My erection is OK, but once I’m in the intercourse I feel it is taking too long and I can’t cum, then my Inner Voice starts to annoy me and immediately my dick becom flaccid! That is frustrating!!!
Try solo edging the same day you’re expecting to have sex.
I think if you think of an opportune time to prepare for cumming, if desiring for it the be inside your partner, it’s not a bad thing to go slow and feel mindfully the inside of them, and not a bad thing at all to alternate with pulling it out and touching yourself with your hand to help bring yourself closer to that edge, putting it inside again, and repeating the process, until you feel your close and then putting it inside and doing that last bit of effort to get you to orgasm and ejaculate. Use lube with your hand (or saliva, at least). In fact, it’s a good idea to get used to lube even when your by yourself because a dry hand is very different from a lubricated vagina, etc, may take some time to get used to the habit of integrating lube with yourself but it’s well worth it and you’ll likely feel it ends up feeling more enjoyable actually. Because I’ve dealt with being too accustomed with my hand when by myself, which as established is different from a lubricated vagina, I’ve acquired a sex toy for men for training myself on a different sensory stimulation and to masturbate mindfully as such, which I’m gaining confidence in enjoying penetration sex.