no not allow
First: It is not allowed to insert penis:from the back (in one's anus),without licit marriage, and/orduring wife menstruation (period)Second: it is a matter of mutual cooperation and enjoyment between wife and husband.
No.There are much better parts in your wife's body. Go for them.
according to Islam it is allowed.
Of Course they can
Breast kissing is allowed in Islam but only between wife and husband per their acceptance and mutual enjoyment. It is a kind of oral sex that is allowed in Islam. refer to question below.
Yes, it is a kind of allowed oral sex between a husband and a wife who are licitly married. Refer to question below.
Yes, it is kind of oral sex that is allowed in Islam on condition to be practiced only between wife and husband who are licitly married. See related question below.
It is allowed up to the preference of wife and husband.
Yes a Muslim are allowed to do so with his wife for sure. Probably washing your mouth well is a part of "gusul" i.e. a bath to be performed after sex.
Yes, it is kind of foreplay allowed oral sex between wife and husband who are licitly married. refer to question below.
Yes, it is allowed for the husband the licking, with tongue and lips, of his wife's nipples. It is a kind of oral sex that is allowed in Islam especially as foreplay. Oral sex (except self masturbation) is allowed between a husband and his wife per their both acceptance, satisfaction, and pleasure. Inserting the penis in the anus of the wife is forbidden. See the related question (is oral sex allowed in Islam?) for more information.
Yes but only between wife and husband who are legally married and it is to be done in private. It is kind of allowed oral sex. Refer to question below.