It may not be you and your technique but his sensitivity and reactions are different than your other bf's. Sounds like you are looking for a ticklish reaction and getting something different. Change tactics.See that's the way I think it is for most people. But if I tickle him with fingers I don't get anywhere near the reaction I get if I kiss or lick his stomach/chest/sides/back. Especially his belly button! I don't get it! lol!
Sometimes I wish I could have an experienced tickler coach me through tickling him.
Maybe I'm doing something wrong. lolol!
But I've been able to tickle ex-boyfriends with fingers and had success. ???idk...