Spell for him/her to be faithful

This spell is very effective in getting your partner to be always faithful to you.
Just get a magnet, spray a little of your colony over it while repeating the name of your partner three times.
Then you give the magnet to your partner.
You can cover up and do it as a joke, but he/she must keep it.
Thus he/she will remain with you as long as you want, but only if he/she keeps the magnet.