The post does point out that there's a table full of penis models (so essentially dildos) and that the task is to put a condom on one of them.
A bodyless fake penis is clearly not a sentient being so the only way a violation of consent happened if consent applied to inanimate objects. That is, of course, a ridiculous and easily attacked proposition.
In the end this would be an example of trying to make a valid point but making it in a clumsy way.
You really have to get into that mercenary mindset. You're obviously not responsible for your actions, if you're just executing tasks someone else wants you to do. Smh
If the person who put the dildos there and handed you the condom is asking you to put that condom on one of the dildos, then the person that owns the dildo already gave you consent to use their dildo, thereby you can't be a raping their dildo. It ain't difficult.
In the context they're obviously saying that the other person initiating sexual activity is consent in of itself, ergo you can't be a rapist for reciprocating that consent.