Praise be to Allaah.
Firstly:
We ask Allaah to grant you
well being in this world and in the Hereafter.
Anyone who becomes junub as
the result of a wet dream or intercourse has to do ghusl, because Allaah
says (interpretation of the meaning):
“O you who believe! When
you intend to offer As-Salaah (the prayer), wash your faces and your hands
(forearms) up to the elbows, rub (by passing wet hands over) your heads, and
(wash) your feet up to the ankles. If you are in a state of Janaaba (i.e.
after a sexual discharge), purify yourselves (bathe your whole body)”
[al-Maa’idah 5:6]
If he cannot do ghusl
because there is no water available, or because he is not able to use it,
then he should do tayammum and pray, because Allaah says (interpretation of
the meaning):
“But if you are ill or
on a journey, or any of you comes after answering the call of nature, or you
have been in contact with women (i.e. sexual intercourse), and you find no
water, then perform Tayammum with clean earth and rub therewith your faces
and hands. Allaah does not want to place you in difficulty, but He wants to
purify you, and to complete His Favour to you that you may be thankful”
[al-Maa’idah 5:6].
Similarly, if a person has
a wet dream and fears that he may become sick if he uses cold water, and
there is no way of heating it, or the water is far away from him and he
cannot reach it, and there is no one to bring it to him, then he may do
tayammum and pray.
Ibn Qudaamah (may Allaah
have mercy on him) said in al-Mughni (1/151):
If a person is sick and
unable to move, and there is no one who can bring him water, then he is like
one who has no water, because there is no way he can get to the water. … If
he has someone who can bring him water before the time for prayer ends, then
he is like one who has water available. End quote.
The sick person who cannot
wash all of his body, but is able to wash part of it, must wash whatever he
can then do tayammum for the rest, because Allaah says (interpretation of
the meaning):
“So keep your duty to
Allaah and fear Him as much as you can”
[al-Taghaabun 64:16]
Based on this, you have to
repeat that prayer.
Secondly:
Semen is pure (taahir)
according to the more correct of the two scholarly opinions, hence you do
not have to wash your clothes or change them. See question no.
2458.
And Allaah knows best.