You've made a really good point about setting boundaries in order to be prepared to compromise
When i was setting the whole coming indoors time thing, my son was insisting on 10.00, so i took one step ahead of him and said 9.30 ... I disn't think 10 was too bad a time , but I wanted him to take some responsibility for setting his own reasonable curfew, anyway, we bartered back & forth, so I said "well, why don't we give each other 15 minutes?" We set it to 9.45 ... which is great, I felt like I'd managed to teach him a good skill, he felt like he got a result/one over on me, he's well happy he's managed to twist me round to his way of thinking :wink: good luck to him, let him think it