Occasional extracorporeal ejaculation in men is generally not harmful.
There is no significant difference between male ejaculation outside the body and physical ejaculation for the men themselves, only the part of the body where the semen reaches is different. There is no obvious difference for men themselves. There is also no authoritative information to show that men’s extracorporeal ejaculation is harmful to the body.
Of course, if you want to use extracorporeal ejaculation for contraception, it may cause contraceptive failure, and there will be the possibility of unwanted pregnancy. It is not recommended to use ejaculation as a contraceptive.
In addition, if frequent extracorporeal ejaculation may lead to ejaculation disorders, because extracorporeal ejaculation needs to control ejaculation and interrupt sexual intercourse, in the long run may have a psychological impact on their own, and may also affect the mood of the sexual partner.