Make trial of orphans until they reach the age of marriage; if then ye find sound judgment in them, release their property to them; but consume it not wastefully, nor in haste against their growing up. If the guardian is well-off, Let him claim no remuneration, but if he is poor, let him have for himself what is just and reasonable. When ye release their property to them, take witnesses in their presence: But all-sufficient is Allah in taking account. (4:6)
Here the word "Nekah" in the Arabic quran is translated "Marriage", however, there is nothing such as age of marriage in islam as we all know. Reaching the age of Nekah, is reaching (ejaculation age in men, and periods age in women). It is clearly the age were sex can be performed.
So if a husband divorces his wife (irrevocably), He cannot, after that, re-marry her until after she has married another husband and He has divorced her. In that case there is no blame on either of them if they re-unite, provided they feel that they can keep the limits ordained by Allah. Such are the limits ordained by Allah, which He makes plain to those who understand. (2:230)
Again we all know that in Islamic law, after the third divorce, the husband can not remarry his ex-wife unless she has sex with another man. The word for sex used here is "Nekah".
Also, the quran clearly mention the words wife and husband and marriage in other suras.
When ye divorce women, and they fulfil the term of their ('Iddat), do not prevent them from marrying their (former) husbands, if they mutually agree on equitable terms. This instruction is for all amongst you, who believe in Allah and the Last Day. That is (the course Making for) most virtue and purity amongst you and Allah knows, and ye know not. (2:232)
In the above verse, the word Nekah was mentioned to indicate that a wife can remarry her ex and have sexuall intercourse with him.
Anyway, my point is Islam considers women to be a sex toy that will distract men from prayers or from staying in WUDO, so even touching them will make your wudo void, just like going to the toilet!