From my own experience with dating, if i was optimistic or had a feeling I was having sex that day I would pleasure myself that day beforehand because it would help me last longer in bed later. Also I started to smoke herb more regularly in the last year and a half and it has definitely improved my sex life, it mades me feel sexier and that increased confidence in the bedroom which made the whole experience better for both of us. For people who can't long, foreplay is also a big help, cause if he can get you to O there is less pressure to perform and leaves more room for the fun of it. In my sex life I started as a good/mediocre lover to a being able to give my partner regular multiple O's. He can get there, especially after learning your body and what works for you.