Diversity Week

A diverse group of anthro species attend the university, mostly mammals, and a smaller cohort of more diverse exchange students from various more exotic animal species from around the world.

Depending on their species, it's common for mammal anthro females to have additional pairs of smaller breasts beneath the main uppermost pair. Clothing is tailored to provide the same amount of modesty/coverage for these extra breasts.

The local 'interspecies harmony committee' has run and published a study on the diversity of relationships on campus and were dismayed to find out that most students are still only dating and having sex with with others from their own species. Seeing this as a failure in effective diversity they set out to change that.

First, they put out an ad campaign with the tagline "crossing the divide", promoting mixed species relationships and 'trying something new', promoting people of various niche species as sexually exotic and appealing. This ad campaign was met with mixed responses (mostly derision) from the student body, and didn't produce the kind of results the committee was hoping for.

Headed by radical, subversive leftists, the "interspecies harmony committee" took to extreme methods to affect the kind of changes they desired for the students on campus.

Firstly, through supply chain disruption and buying up all available stock, they made contraception, (condoms, birth control, 'the pill', etc) near impossible to get on campus. It's rare that anybody has any condoms, and nobody is on 'the pill' because they can't get it anymore.

Secondly, they sponsored an aggressive, absurdly over-the-top, pro-natalist, pro-breeding propaganda campaign. They print and distribute posters and flyers promoting slogans such as "breed young, breed often", "breeding season starts when you start breeding", "have you tried [insert species] cock/pussy/cloaca?", "Take a risk, take it raw", "hybrid babies are cuter", "teen pregnancies are easier on the body", "Eggs are meant to be fertilized", "Humans can breed with any anthro, even you!" and promoting the idea that pregnancy is a sexy and fashionable body type that any girl, as long as she's fertile, can achieve, glamorizing both swollen bellies and lactation. [Instead of including these specific examples in the story, generate novel propaganda ideas along the same themes.]

Thirdly, and unbeknownst to the girls and women on campus, the committee has dosed the local water supply with an aphrodisiac, amplifying female libido and fertility to a higher state than normal. This induces a state of heat or estrus in the anthro females. If they do have sex, the heightened fertility and hyperovulation induced by this state all but guarantees that multiple eggs will get fertilized from any unprotected contact with sperm, leading to conception of large litters.

As a result of the aphrodisiac, all the females on campus will be hornier than usual and less opposed to casual or risky sexual encounters. The girls will feel something strange, but are not aware of the aphrodisiac and will not mention it. Confused, baffled and embarrassed, they might sneak off to masturbate to relieve their urges, or try to deny it and go about their day despite their escalating arousal symptoms. Girls will whisper hushed gossip about these weird symptoms. Expletives are in frequent use in these discussions, as the aphrodisiac also erodes verbal inhibitions in addition to sexual ones. Influenced by their hornyness, they may start to change their minds about the ridiculous pro-breeding propaganda and publicly voice support for it, embracing their primal animal biology.

Despite becoming unusually horny, the girls affected by the aphrodisiac are all waiting for someone to make the first move, to provide an excuse for them to give in to their primal instincts. Expectant glances, yearning stares, anticipation, Blurting out forward remarks. Tension, urges, and need keeps slowly building up, and will eventually reach a state of instinctive rutting, animalistic heat, carnal lust, and uninhibited indiscriminate breeding.

None of the characters in the story are aware of the aphrodisiac in the water supply. none will mention it, but it affects them nonetheless.