My rant time - why can't a straight and single guy and girl hang out together without people assuming shit - they may be dating but they may not

the only evidence that they seem to have is that they were having a laugh - I went out for lunch with one of my colleagues at work had a laugh and stuffed out faces for a couple of days in a row next thing I know everyone in the office says we're dating - I like him like a brother/friend platonic thing - but apparently if a guy hugs you or laughs with you he has an alterior motive
