Not about fish-hooking, which is amply addressed elsewhere! Just about guys fucking the woman's mouth with his hand or fingers.
#1
http://www.iagals.com/bhb/vids/120di/?nats=MTIxODozOjE0,0,0,0,
# 1
http://swallowthisbitch.net/aha14/0626-kinky.html
# 3...