There are herbs which are especially recommended for use in love spells of the sexual nature.
Please keep in mind that there are nonsexual love forms and spells.
You may want to use these.
Damiana - also good for bringing a lover back to you
cumin - keep a lover faithful to you more than getting a new lover
cubeb berries - also good for keeping a lover
lemon mint- more for getting a new lover
cinnamon- more for getting a lover or getting rid of obstacles to stronger love between you
corriander seeds - easy to feed to your spouse to keep a lover faithful
ginger root - good for both getting and keeping a lover
gentian herb chips
There are more, but this should give some help to most.