The most important sex organ is not below your waist, but above your neck, i.e. your brain. Yes, you need genitals to have sex, but you sense the wonderful feelings in your brain. So, yes, there is a definite mental aspect to sex. And there also should be an emotional aspect. In other words, if you love the person with whom you’re having sex, it will feel even better. So my advice to you is the same advice your brain is giving you; stop engaging in one-night stands and find a young lady with whom you can form a relationship. Make that your priority instead of just “scoring” and you’ll find your enjoyment of sex will be much better.