I don't want you dick, I just want to say hi

Why is it when people you have slept with in the past come in to town for a visit, and you try to call them to hang out because you are good friends, do they just assume I want to sleep with them so they ignore me?  NEWSFLASH:  I really just wanted to say hi and eat dinner.  Men.  That's why I stick with women.  Women would always eat dinner.