Cal: tattoos
You think Calum's tattoos are the greatest thing, you're constantly looking at them. When you guys are cuddling or just get bored you trace his tattoos with you fingers and he loves it.Luke: eyes
His blue ocean pools always have and always will enchant you. You always make sure to look Luke in the eyes which usually results in you zoning out because you get lost in them.Ash: arms
You just love Ashton's arms because they are so big and muscular, when he hugs you or cuddles with you, you feel safe because of those arms.Mikey: smile
You literally think Michaels smile could end world hunger. You just love how when he walks in a room smiling it brightens it up and causes everyone else to smile.