Job in an Islamic bank

Q: Is it permissible for me to accept a job with an Islamic bank (credit department- analysing client's creditworthiness and financials)? I am aware of the controversies surrounding the bank but I am also aware that certain Ulama have stated that it is permissable to work there.

Oral sex

Q: I apologise for the nature of my question. I understand the fatwa relating to oral sex however during relations with my wife is it permissible to stimulate/arouse her by kissing or sucking her clitoris - which is situated above the vagina/urethra and taking care not to get into contact with body fluids?

Birthday Party

Q: I wanted to know that if a relative invites me for a dinner party which is for celebrating his sons birthday then should I avoid the invitation or should I join the dinner party and avoid the birthday celebration?