Rules of Genabat.

347. A person enters the state of Janabat in two ways:
Intercourse; discharge of semen, while sleeping or when awake, little or more, with lust or otherwise, voluntarily or involuntarily.

348. When one cannot ascertain whether the fluid emitted from one’s body is semen, urine or something else, it will be treated as semen if it is thrown out with lust and if the body is slackened. If all or some of these signs are not present, the fluid will not be treated as semen. In the case of illness, the fluid may not come out with sudden swiftness and the body may not slacken; but if the emission takes place with lust, it will be treated as semen.

349. It is Mustahab that a person should urinate after the seminal discharge. If he did not urinate and an emission was seen after Ghusl, which could not been determined as semen or something else, it would be treated as semen.

350. If a person has sexual intercourse with a woman and the male organ enters either of the private parts of the woman up to the point of circumcision or more, both of them enter Janabat, regardless of whether they are adults or minors and whether ejaculation takes place or not, and it is front or rear

351. If a person doubts whether or not his penis penetrated up to the point of circumcision, Ghusl will not become obligatory on him.

352. If God forbid a person has intercourse with an animal and ejaculates, Ghusl alone will be sufficient for him, and if he does not ejaculate and he was with Wudhu at the time of committing the unnatural act even then Ghusl will be sufficient for him.

353. If movement of seminal fluid is felt but not emitted, or if a person doubts whether or not semen has been ejaculated, Ghusl will not be obligatory upon him.

355. If a person observes semen on his dress ad knows that it is his own, and he has not done Ghusl on that account, he should do Ghusl, and repeat as Qadha all those prayers about which he is certain that he is certain that he offered them after the discharge of semen.