When two men who claim to be straight engage in oral or anal sex and claim that it's to 'help out a brother in need'
This is often used as a justification or excuse to engage in homosexual intercourse.
This phrase can also apply if the submissive member is part of the lgbt community and the dominant member claims that they are straight and visa versa
I gave my bro a homie assist cuz he needed to get some stress out.