"Prohibited to you (For marriage) are:- Your mothers, daughters, sisters; father's sisters, Mother's sisters; brother's daughters, sister's daughters; foster-mothers (Who gave you suck), foster-sisters; your wives' mothers; your step-daughters under your guardianship, born of your wives to whom ye have gone in,- no prohibition if ye have not gone in;- (Those who have been) wives of your sons proceeding from your loins; and two sisters in wedlock at one and the same time, except for what is past; for Allah is Oft-forgiving, Most Merciful;" - Quran 4:23 (read more)

"Narrated Atiyyah al-Qurazi: I was among the captives of Banu Qurayzah. They (the Companions) examined us, and those who had begun to grow hair (pubes) were killed, and those who had not were not killed. I was among those who had not grown hair." - Sunan Abu Dawud 38:4390 (read more)

"...resembling animals is not something appropriate for the Muslim to do, because it is humiliating a soul that Allah has honoured with reason, and resembling animals is not mentioned in the Qur’aan or Sunnah except in the context of blame. If the [child's] costume of this animal is three-dimensional, it is not permissible because it comes under the heading of making images, which is forbidden in the texts. As for costumes resembling inanimate objects, there is nothing wrong with wearing them and using them." - Shaykh Dr. Ahmad ibn Muhammad al-Khudayri