If you are a guy or a girl and there is a girl in your bed and is not wearing her panties or only wearing her panties, and has been at
your place for more than an hour, or more than a day, then she could be your significant other, otherwise she could be a hooker.
If you are a girl or a guy and there is a guy in your bed and he inserted something of his inside of any of
your body's openings during the night, and has been at your place for more than an hour or a day, then he could be your significant other, otherwise, he just may be a
male prostitute, or the one you met at the bar last night