Vampire/Kas Eddie has been hiding out with Steve for a while, and like any vampire he has to feed- on human blood. Steve reluctantly obliges and finds he maybe likes Eddie’s fangs sinking into his skin, draining him dry and leaving his mark a little more than he should.
Aka Steve is turned on by Eddie sucking his blood.

Bonus:
• Eddie kisses Steve with his blood on his lips
• maybe Steve lets him go too far and Steve passes out from blood loss, Eddie feels guilty, etc idk