Mechanophilia

Mechanophilia is a mental disorder of the type paraphilia described as a sexual attraction to inanimate objects (mainly machines, hence the name). It develops during the late anal period (5-7 years old) and is much more common among girls.

Diagnostic criteria

Insertion of Barbie dolls/model railway/Tamagotchi or similar into oneself's vagina/anus/peepeehole during early childhood.
Have ever watched a Chobits episode.
Hugging pillows.
Intense, recurring, sexually arousing fantasies or dreams of anything without a heartbeat for a period of at least 6 months.
Using a zeta toy - furry mecha, extremely fucked up.
Purchasing a dildo/artificial pussy.
Having an orgasm caused by a butt machine.
Sexual arousal by the thought of getting a pacemaker.
Obsession with Transformers porn.
You are Realmrsoptimusprime

Prognosis

Everything has been tried - even real, live intercourse with a prostitute. It didn't help. Possible reasons of this revealed by a scientific study conducted at Kyodai include:

Artificial pussies/anuses are tighter than real human genitalia.
Dildos are more powerful/bigger than the genuine article.
Hitachi Lick-o-matic with Duracell batteries never wear out while real carpet munchers' tongues get tired pretty fast.
Most importantly, real sex requires the participants to experience some emotions, of which mecha are incapable.

The situation is not hopeless, however. Japanese and Koreans are already developing robots that have genitals mimicking that of humans, and mecha is lawful in most parts of the world.