In society, straight boys are typically associated with heterosexual relationships and behaviors. The idea of'straight boys suck eachother' is not in line with the general perception of straight masculinity. It is a very rare instance, if it even occurs at all. This is because of the way sexual orientation and gender - based social expectations are structured. Most straight male relationships are based on friendship, camaraderie, and shared interests that do not involve such behavior.
It's extremely rare. In mainstream society, straight boys are defined by their attraction to the opposite sex. Such behavior as described in the 'story' is not part of the normal pattern of straight male interaction. Social, cultural and sexual orientation norms all point to this being an out - of - the - ordinary situation.