Masaail relating to intimacy

Q: Is it allowed to have sex with the wife from her back side without intercourse from the back side (just to rub the man sexual organ with the wife's back side)?

Q: I recently have received the information below, and I wanted to enquire about its authenticity. 

The author of IHYA states:- It is Makrooh to indulge in sex during three nights of each month; the first, the last and fifteenth. It is said that Shaitaan is on the prowl on these nights. The undesirability of sex on these nights is narrated from Hazrat Ali, Hazrat Mulawiya and Hazrat Abu Huraiah (Radiyallahu-Anhum). 

The author of RIFAATUL-MUSLIMEEN states that in addition to the above; Wednesday nights and the nights of the two Eids must also be avoided. Also the night where after a person intends to go on a journey on the next day should be avoided. Intercourse on these nights may have an undesirable effect on the off-spring.

It is reported in TIBBE-NABAWI that  Rasulullah (Sallallahu-Alayhi-Wasallam) advised Hazrat Ali (Radiyallahu-Anhum) not to cohabit on the fifteenth night as the shayateen appear in large number on this night. 

In a footnote of SHAMAIL-TIRMIZI it is stated that if the child is conceived during salah times (When the salah is neglected), the result will be a disobedient child.

Q: I want to know that if oral sex between husband and wife is allowed in islam or not?

Q: Can husband and wife can do oral sex? I mean can they kiss on the specific parts of each other?

Q: Can I put a condom on my husbands penis and suck him? 

Q: If I put my finger im my wifes private part does she have to make a ghusl? Also I suffer from premature ejaculation can I mastubate myself release sperm wait for erection then enter my wife?

Q: Is it permissible to use a vibrator during foreplay?