<human>: So Geoff Ramsey and Gavin Free from Roosterteeth/Achievement Hunter present a lot of hypothetical situations to each other and see how the other would react.
One of the situations was, 'Your mum and your girlfriend switch bodies. Mother in girlfriend's body, vice versa. The only way to reverse this, was to have sex with one of them'

This was in highschool, so I would walk around talking to people, and I would remember the situation and ask people. Have a laugh. 
I get to my one friend, Ben. He's just sitting there with his girlfriend at the time.
Before popping the question, I remember that his mum passed away when he was quite young, so I need to find some way around this because I would love to hear his thought.
Because I'm a fucking dumbass, without thinking I go, "Alright, just pretend you have a mum for a sec"
Most awkward 30 seconds of silence while his girlfriend stood there jaw dropped and I was trying to figure out how to follow up. 

Because he's a good friend he knew I didn't mean to say that and he knows I'm an idiot, so shout out to him.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: Told my friend who's mother passed away to pretend he had a mum for a second so I could ask him a hypothetical question.