This decision is entirely up to you. There's nothing wrong with you if you don't want to, but it's nice to let your partner know it's nothing personal. If you don't want to swallow, and you aren’t familiar with the signs of imminent ejaculation, let him know you want a warning. Remove your mouth as he's about to ejaculate, and continue hand stroking through his orgasm.
The surest way to not get a sexually transmitted infection from oral sex is to abstain from vaginal, anal, and oral sex or to be in a long-term mutually monogamous relationship with a partner who has been tested and is known to be uninfected. However, many infected persons may be unaware of their infection because STIs often have no symptoms and are unrecognized.
Semen ingestion has had central importance in some cultures around the world. In Baruya culture, there is a secret ritual in which boys give fellatio to young males and drink their semen, to "re-engender themselves before marriage". Among the Sambia people of Papua New Guinea, beginning at age seven all males regularly submit to oral penetration by adolescents in a six-stage initiation process, as the Sambia believe that regular ingestion of an older boy's semen is necessary for a prepubescent youth to achieve sexual maturity and masculinity. By the time he enters mid-puberty he in turn participates in passing his semen on to younger males.
Drive him wild: Have your man lie on his stomach and give him a massage by doing light, karate-chop type movements along his sacrum. "Doing this not only stimulates those sacral nerves, but also triggers the parasympathetic nervous system which is key for relaxing, letting go, and having an orgasm," Michaels says. (Related: 7 Tips for a Better Orgasm)
To Control – Using sex as a weapon and method for controlling your man is a recipe for disaster. If you start withholding sex to try to get your husband to do something, then both of you are going to develop a negative attitude towards all things sex very quickly. Equally, promising to give him a blow job only if he does this or that is going to foster an unhealthy situation for your sex life.
There is an increased risk of STI transmission if the receiving partner has wounds on his or her genitals, or if the giving partner has wounds or open sores on or in his or her mouth, or bleeding gums. Brushing the teeth, flossing, undergoing dental work soon before or after performing oral sex can also increase the risk of transmission, because all of these activities can cause small scratches in the lining of the mouth. These wounds, even when they are microscopic, increase the chances of contracting STIs that can be transmitted orally under these conditions. Such contact can also lead to more mundane infections from common bacteria and viruses found in, around and secreted from the genital regions. Because of the aforementioned factors, medical sources advise the use of condoms or other effective barrier methods when performing or receiving oral sex with a partner whose STI status is unknown.
Some men can have problems reaching orgasm. These most often stem from psychological factors; for example, they are still affected by a traumatic event or a restrictive upbringing, or they have fallen into masturbation patterns that could have conditioned the body to take longer to orgasm. However, the problem also can be caused by certain medications or by a neurological or cardiovascular disease, or by having surgery where nerves are cut, says Beverly Whipple, PhD, RN, professor emerita at Rutgers University in Newark New Jersey, and past president of the American Association of Sex Educators, Counselors and Therapists (AASECT).
Really, this happens. In a recent BMJ case report, dentists detailed how a patient who regularly performed oral sex on men developed a strange lesion on the roof of his mouth, due to “blunt trauma” during fellatio. The sucking motion associated with fellatio may have also played a role, the authors wrote, causing blood to pool and clot in this area.