I think as newbies the just decided to look after each other backs on going in, which seems pretty sensible.
Maybe hussain thought that guaranteed a blow job in the toilet or something because he is acting like a spurned lover, when I havent seen Isabella give him any sexual signals at all. Compare that to Lewis who she gazes at longingly and there is a pretty obvious difference
However, i am wondering if we have not been shown something as Akeem seemed to be 100% with Hussain and I can't see for the life of me why he would come to that viewpoint