a girl and a guy is dating and having sex 
the guy is fucking the girl in the vagina 
the girl wants the guy to fuck her in the ass 
but she doesn't know how to communicate that to the guy 
if the guy asks the girl if he can fuck her in the ass 
then she will say no 
because she wants to be a good girl 
if the guy non-verbally communicates that he wants to fuck her in the ass 
then she will say don't do it 
because she wants to be a good girl 
the girl think it's important that she is a good girl 
because that's how she will protect her guy 
through social defence 
the guy could sweet talk his girl 
into making her showing him 
that she wants him to fuck her in the ass 
when the guy fucks the girl in the vagina 
then he could whisper to her 
that he wants to fuck something tighter 
something that's tight like a younger girl's pussy 
or he could whisper to her 
that he knows that her asshole wants to swallow his cock 
or that everytime she is in the toilet taking a shit 
then he knows that her asshole is relaxed 
and he wants to open the door 
and bend her over the toilet 
and push his cock inside her relaxed asshole 
and fuck her relaxed asshole 
and so on 
guys probably don't feel comfortable 
whispering such dirty things to their girlfriends 
because a guy that likes his girl 
wants to show her respect by not treating her like a whore 
and a guy that whispers dirty things to his girl 
is treating her like a whore 
if a guy is normal to his girl 
but sometimes treats her like a whore 
then that could show that his passion for her 
makes him loose control 
and that makes his girl feel sexy and desired 
the girl wants the guy to fuck her in the ass 
the guy feels that the girl wants him to fuck her ass 
but the girl can't communicate that to him 
and the guy is unable to make her show him what she wants 
so it's a dance 
how to communicate desire in a relationship 
one step forward 
one step backward 
one step to the right 
and one step to the left 
verbally and non-verbally