And you don't have to spend money for another person, so you can be broke all for yourself

It's the sensation of when another obtains contact with you through clothing or directly onto the skin. If the subject is someone you are even slightly attracted to, romantically or as a friend, then you will be filled with oxytocin making you want to have more contact causing a terrible cycle of awkwardness. Other chemicals like dopamine and other endorphins are released causing a pleasant experience that if aimed at a target that connects with your sexuality (Such as a straight male and a straight female) it can develop further into an experience known as "love".

It has lots of perks when you're content with yourself
Lots of people freak out when they get outta the relationship but honestly those people should be single for a while to get around with themselves first