There's a whole story here, but I'm not a writer. So point blank form:

-You are gifted a cartoon mattress. You are unsure if you want to keep it
-Your friend hates it and she wants you to get ride of it. She does jokes make a joke about how would never be able to get ride of it; If there was always a girl in it.
-Toons including objects like the mattress always want to be used or be entertainment for humans so sensing this girl wouldn't ever be an audience, grabs her and turns her into this a bed bug.
-Now she never lives in your mattress.
-About 1.5 Feet talls, only ever laughs, screams, shouts, but never seems to talk. Sexually malicious all the time, and bites! She's quite in love with you, but you have no idea whats going on in her mind. As she tired to keep you in bed all the time as her own personal sex slave.
-Seems to be able to to 'disappear' into the mattress.
-Makes it very hard to sleep as her bites work like viagra.
-At some point you drag the mattress to a couple physicist (female) who tries to get through to her.
-Your bedbug girl friend throws the physicist into the mattress and turns her into a second insane and love crazy bedbug, they strap you to the mattress and care you back home. Where they seem to talk in some unintelligible cartoon speak. And want nothing but your attention.