What is Hug Plus One?
1.
The concept of getting an erection during a hug. Creepy when one hugs a girl, gay when one hugs a guy, may on occasion (read: in pornography) have a happy ending.
Whoa, whoa, whoa! Cut down on the PDA, man. I don't want your hug to become a hug plus one!
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Travel between star systems - which may someday be do-able but given that even our closest star is 4.6 light years away it is something ..