College is a wild time for everybody. Sir Nick Offerman (aka Ron Swanson) of course was no different. On last night’s The Tonight Show, Offerman shared with Jimmy Fallon his sexual coding system he devised with his roommate to let the other know how long to stay out of the room. Ties on doorknobs, yarmulke, all the basic essentials. Offerman also talks about his infamous woodworking skills and doles out some advice to viewers.