So i have two pet rats...

I have two pet rats, and they get very excited when you talk to them or yell stuff at them. So very often, at random times, I get the urge to yell at them. And the most common thing I yell at them is: "Show me your rat tits." Yes, I yell at my rats to show me their tits (they are female, as am I). They get very excited and start jumping up on the bars of the cage, and it almost looks as if they actually are flashing me their tits. It fills me with glee to know I own such willingly slutty rodents. So basically, I've trained my rats to flash me on demand. Is this normal?