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 প্রশ্ন on Fanpop." "WHAT THE HELL IS ফ্যানপপ আপনি FREAKING PSYCHO!" "...Fine, I'll go ask him...."
....Yeah. I think it's big, though, but I have bangs.