Sex
Adult content. This page describes the mechanics of sexual interaction.
Sex is a paced exchange that resolves over multiple rounds, and skill on both sides matters. The key wrinkle: your pleasure is driven by your partner's competence rather than your own. Paying attention gets you further than spamming commands.
Everything below runs on the same check and effect systems as the rest of the game — nothing here is a special case, so what you already know transfers.
The loop you actually play
Every round, both of you roll the fuck skill, those rolls feed each other's arousal, and arousal climbs toward a climax threshold. Repeat until someone tips over.
Consent gates everything. Nothing starts until the recipient allows it. You always control your own participation — no one forces an interaction on you. Non-player characters set their own terms (usually: they have to be aroused and willing), so you can't force one either.
Arousal: your partner does the work
Each round you bank arousal toward orgasm. This is the equation that matters most, and it's cross-coupled: the margin in the formula comes from your partner's roll, not your own.
$$ \Delta = A \times v \times \left(1 + \max!\big(0,\; \tfrac{c_{\text{partner}}}{10} + 0.8\big)\right) $$
| Term | What it is |
|---|---|
| $A$ | Base pleasure of what's being done, scaled by the body parts involved. |
| $v$ | Per-round variance, roughly $0.9$ to $2.9$. No two rounds feel the same. |
| $c_{\text{partner}}$ | Your partner's check margin this round. Skilled and rolling well → they push you toward the edge fast. A fumble barely beats the baseline. |
Because of that coupling, a lopsided pairing (one expert, one novice) sends the novice over first while the expert lasts. Two skilled partners just escalate each other.
Tipping over
Arousal banks into a climax progress meter, and you orgasm the moment it hits your maximum health:
$$ \text{climax progress} \;\ge\; \text{max health} \;\Rightarrow\; \text{orgasm (meter resets)} $$
Because the bar is your max health, hardier characters take longer to finish and frail ones go sooner. The meter resets to zero afterward, so a long session can rack up several.
Fit matters: insertion compatibility
For penetrative acts, size has to fit — and arousal temporarily buys you room. The receiver has a comfortable capacity that grows as they warm up and approach climax:
$$ \text{max comfortable} = \underbrace{\text{base capacity}}{\text{flexibility}} + \underbrace{0.5 \cdot \text{arousal doses}}{\text{warmed up}} + \underbrace{\frac{\text{climax progress}}{\text{max health}} \cdot 3}_{\text{near climax}} $$
$$ \text{insertion allowed} \iff \text{length} \le \text{max comfortable} $$
So foreplay is mechanical: the more aroused and the closer to climax the receiver is, the more they can take. Base capacity is their flexibility; arousal and an approaching orgasm stack temporary room on top. Anything too long for the current capacity is simply rejected.
Arousal is an effect, too
Being "horny" is tracked as a lasting effect that rises and falls over time like any other (same machinery as hunger). While it's active it:
- accumulates in doses — these feed the insertion-capacity bonus above,
- changes how your body reads to others, and
- gates NPC willingness — for non-player characters, no arousal usually means no participation.
When someone finishes inside
An internal finish is where consequences live. Two systems can fire.
Conception
An internal finish into a fertile partner rolls for conception. The chance multiplies where they are in their cycle by the virility of the finish, capped at 95%:
$$ \text{chance} = \mathrm{clamp}\big(\text{cycle fertility} \times \text{virility},\; 0,\; 95\big) $$
Cycle position swings the odds enormously — near-nothing during menstruation, a sharp spike at ovulation, tapering off through the luteal phase:
| Phase | Base fertility |
|---|---|
| Menstrual | 1% |
| Follicular | 15% |
| Ovulation | 85% |
| Luteal | 25% |
Virility scales with volume — a meagre finish is barely fertile, an average one neutral, a copious one well above baseline. There's no notification: conception is silent, discovered later through symptoms, with gestation proceeding as its own slow effect.
Knotting
Some anatomies knot on an internal finish. Both partners lock together for ~15–30 minutes — no moving, fighting, or disengaging until it subsides. Commit accordingly.
Contraceptives
Barrier protection is single-use and fallible, and the heavier the finish, the more likely it tears:
$$ \text{break chance} = \max\big(1,\; 2 + (\text{volume level} - 5)\big)\ \% $$
A typical finish breaks it ~2% of the time; an unusually heavy one strains it further. Breaks → the fertility roll above runs. Holds → conception is skipped.
See also
- Skill Checks — the per-round rolls that drive arousal.
- Food, Satiety & Rations — the effect/heartbeat machinery arousal and gestation run on.
- Progression: Skills — the fuck skill sharpens with practice against worthy partners.