Marc : His muscles. You love it when he wraps his arms from around you and presses his body against yours gently burying his face in your neck giving you little kisses every now and then.
Steven : His hands. The veins in his hand end up showing whenever he's reading to you or carrying you easily due to his insane strength. He knows you love it and sometimes flexes on purpose and smirks.
Layla : Her jealous behaviour. The fact she's not afraid to grab you and make out with you in front of whoever's bothering you makes you burst in lust , love and other things. You belong to her.