if a girlfriend and boyfriend live together 
then they probably know each other well enough 
so that their communication atleast somewhat works 
most girls have a primal desire to be anally raped 
it's more than a fantasy 
it's something that a girl wants to happen to her 
but girls don't allow themselves that pleasure 
and guys don't do it because it's illegal 
but before rape was legal in a marriage in many countries 
so a girlfriend and a boyfriend could do rape play 
which is simulating a rape 
for the girlfriend's pleasure without the boyfriend breaking the law 
which according to media some couples do 
to prevent their relationship from dying 
the easiest way to rape play 
is for the guy to spit on his cock 
and push his cock inside the asshole of the girl 
while the girl squeezes her anus tight 
and the girl squeezes her belly 
so that her rectum becomes tighter 
and when the cock pushes inside the girl's anus and rectum 
then the girl makes painful noises 
and if she is able to she cries 
but the girl needs to keep in mind 
that if she squeezes her anus too tight 
and if she squeezes her belly too much 
so that her rectum squeezes too tight 
then the guy might not be able 
to push his cock inside her asshole 
so the girl needs to feel 
if the guy is able to push his cock inside her asshole 
and if he is not 
then she needs to relax her anus a little 
and when his cock pushes inside her anus 
then she can squeeze her anus tighter 
but when the cock has pushed inside her anus 
then the guy will be able to push his cock inside her rectum 
so she should focus on squeezing her belly 
so that her rectum becomes tighter 
if the girl squeezes her anus 
then it feels to the guy 
like the girl doesn't want him to fuck her ass 
and if the girl squeezes her belly 
so that her rectum tightens 
then it feels to the guy 
like the girl is an anal virgin 
the girl and guy could do rape play 
in the kitchen 
while the guy pushes the girl 
so that she leans over the sink 
and in the living room 
while the guy pushes the girl 
so that she stands on her knees in the sofa 
with her belly against the sofa backrest 
and in the bedroom 
while the guy pushes the girl 
so that she leans forward 
while she sits on her knees in the bed 
if the girlfriend and the boyfriend fights in their relationship 
then the boyfriend could do rape play with the girlfriend 
after or during the relationship fight 
if the girl is sad or depressed 
then the guy could do rape play with the girl 
if the girl says no 
then the guy would be breaking the law 
if he fucks her ass