To bring oneself to orgasm by various acts of anal-simulation.
Vanilla masturbation doesn't work for me anymore, now the only way I can cum is if I assturbate.
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Inserting an object up your butt while wanking
Being extra horny, I began to assturbate
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Susie likes to assturbate, you know, finger her asshole
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To use a butt to masturbate one's penis.
I never care about the face or the body. I just grab the hips and use that ass to assturbate my cock.
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To pleasure the anal cavity of oneself with the intent of sexual gratification.
I really wanted to go down on her last night, but when I got home she was in the middle of an assturbation session to the new Justin Timberlake video.
Masturbation focused on pleasuring the butt, whether it be by massage or insertion.
Wow, this banana is frozen rock solid. I'm gonna have a good assturbation session tonight!
Masturbation restricted to the ass region. Usually performed by placing dildos, buttplugs, fingers, toothbrushes, or whatever else may be handy into the anal cavity. Lube is optional but highly recommended.
Suzy had never considered assturbation until she overheard Julie talking to Maria about shoving a 9 inch vibrator up her ass while fantasizing about Tom (Suzys dad).
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