Ok so i don't feel like bicep curls work for me.I feel like i'm mostly working my forearm when doing them.The way i do them is 24 sets 12 each arm(at the same.time) and 4-5 reps.Only way i feel my biceps when doing this is if i use higher weight but can only rep max 5 depending on weight(so i'm training for strenght this way but don't want to?).What should i do?Change exercise and if so what other exercise should i try?