1800s expression for dating
It shows you profiles of people which are “0 feet away” as their slogan says.
 Tinder: It is time to update your Facebook profile, since this app matches based on interest, networks, and locations associated with your Facebook profile.
It’s perhaps the ultimate, “What is your ideal date” question.
Technology-facilitated dating thus provides avenues for love and for social support that we might not otherwise have access to.
Adding to the mystery is the fact that the app may take a long time to suggest your profile to them.  Bang with Friends: This racy app also uses your Facebook friends, or friends of friends, to find out who is interested in ‘banging’ (i.e., having sex).
Be careful when using it though, since it includes in your potential pool of mates everyone on your Facebook friends list, including your parents and cousins.
Some may be concerned about possible dangers of technology-facilitated dating.
For example, maybe people are more likely to lie and pretend to be someone they’re not.
The expression using head is colloquial and dates from the mid-1800s, nut has been slang for "head" since the mid-1800s; rocker, dating from the late 1800s, may allude to an elderly person falling from a rocking chair; trolley, also dating from the late 1800s, may be explained by George Ade's use of it in Artie (1896): "Any one that's got his head full of the girl proposition's liable to go off his trolley at the first curve." The last, chump, is also slang for "head" and was first recorded in 1859.