Sexual Relationships 
Sexual Health 
There is nothing a girl can do for a guy sexually that will make him feel more loved than a skilled, patient blowjob, but most girls do not know to give one and most guys can't articulate what really works for us. That's why even in commercial porn men often have to finish themselves.
A blow job is not slutty or degrading and it is not passionate sex. It is skilled, nurturing sexual therapy; all about understanding what, when and where attention is needed. Done with patience and skill, a girl can be completely bland, silent and fully dressed and still give a spectacularly effective blow job.
It isn't complicated. If you just follow the steps and time them right, he will have a very satisfying "happy ending" in about 15 minutes. Edging him a bit out to 20 minutes overall can sometimes intensify that happy ending. In its simplest explanation, a blow job is about getting him highly aroused for long enough to prepare him for a strong, productive orgasm and then bringing it through to finish him strongly.
Start with a nipples to knees erotic massage to get him aroused. Don't spend much time on his penis or balls because you do not want him to come early. Only massage near and around them for anticipation and don't stop for little teases because they can distract from the progress to arousal. The erotic massage wakes up the semen pipeline, engorging his prostate and seminal vesicles and getting him fully hard for a stronger, higher volume ejaculation.
When he is fully hard and flowing precum, start to build his orgasm, combining bobbing and sucking to just below the ridge on the head of his penis (the corona) and the groove behind it (the sulcus) with hand stroking the shaft of his penis in sync together. There's no need to go too fast. Your mouth takes care of his penis. Your hand takes care of his shaft. Cup, lift and massage his balls with the other hand.
Progress toward orgasm during a blowjob is like climbing a down escalator. The giver has to maintain a consistent speed and rhythm that build arousal. Slowing or pausing and changing technique can distract and cause the receiver to "lose ground", which he may not be able to recover.
When he starts to buck and his breathing gets shaky, go aggressively for the finish. Use maximum intensity at the head and stroke his shaft as fast as you can. When he starts to ejaculate, stop all mouth motion but continue to suck. Slow down stroking but continue, to coax out the remaining squirts. Continue to suck gently until he unplugs.
This probably seems mundane but it gives the penis what it needs when and where it needs it. Extraneous antics like deep throating are wasted effort. An effective blow job will leave him feeling spent and grateful
One guy's opinion.
What Girls & Guys Said
1 0i will start from teasing. my ex has upskirt fetish so, i wear a mid-thigh bodycon skirt, not too long not too short. this gives a lot of excitement. He get a boner and a lot of pre-cum. I start to torture him, maybe teasing other guys too. then when we back at room, he will get wild. i start from slowly wrap my mouth around him, go up and down while my tongue move at the same tempo with my lips, my eyes contact when he about to blow.
Finally swallow his big load as my reward.