When a man gets sexually aroused and 'horny' so he masturbates and when he cums he lets his seaman fly into the fish tank, killing the fish, but resolving his sexual fustration.
I had a wank last night and didn't want a huge mess all over the carpet so I did it in the fish tank!
When a female has a smelly pussy, and traps you under the bed sheets.. much like the common Dutch Oven.
The hilarity of my boyfriend's dutch oven was quickly dissolved when I instead spread my legs and the dreadful smell of pussy entraped him in a tank of my vaginal fishyness. Boom, fish tank(ing).
The period of time where sex (usually heterosexual penetration) is so boring that you'd rather pay attention to the guy's conveniently positioned fish tank than actively engage in sex.
A: "Hey, I heard you and Tom hooked up last night, how'd it go? Is he worth a go?"
B: "For someone who's so experienced, there was way too much fish tank time. Would not recommend."
A particularly large dose of man fat applied liberally to the inside of a woman's beef curtains. Ideally needs to be enough for a fair amount of drippage