Duffing may be be a solitary pursuit, but it's certainly a private house-bound one. You might engage in some duffing with a spouse, or other peer-group family, but the one place it will take place is in your home. Or your garden. The two places where duffing will take place are your house and garden. And maybe an allotment. Amongst the duffing... amongst the places where duffing may take place... I'll come in again...