I haven't really compared my forehead with many other people, but here is what I believe would happen if this occured with my crush:
"Hey, can I look at your forehead?" "Why?" "Oh, I need to answer a vraag on Fanpop." "WHAT THE HELL IS FANPOP u FREAKING PSYCHO!" "...Fine, I'll go ask him...."
....Yeah. I think it's big, though, but I have bangs.