SolarPerformance/LordAuran

In my campaign, sexual performance checks use either Dexterity+Performance or Charisma+Performance, and these charms are written with that system in mind. I find the use of Craft(courtesan) silly, though I aspire one day to use that specialty to create a castrated Don Juan with "Craftsman needs no Tools".

Fingertips Read the Lover's Dreams

Cost: 2 motes
Duration: Scene
Type: Simple
Min. Performance: 2
Min Essence: 1
Prereqs: Masterful Performance Exercise

The PC gains an intuitive understanding of a chosen sexual partner, allowing him or her to fulfill physical needs and fantasies about which he or she couldn't (and consciously doesn't) know. For the duration of the charm, when making sexual performance checks involving Charisma, do not add Charisma to the die pool; simply apply Charisma as automatic successes. These successes, though not technically rolled, do count toward the additional success cap of Masterful Performance Exercise. The PC may have only one instance of this charm active at once; he or she may not use it multiple times to gain its benefits in relation to multiple partners.

Sensual Touch of Rain-Damp Soil / Ecstatic Rush of the Untamed Stag

Cost: 3 motes
Duration: Instant
Type: Simple
Min. Performance: 2
Min Essence: 2
Prereqs: Fingertips Read the Lover's Dreams

With this charm, the PC may use his own demeanor and actions to improve the sexual skill of another. The target of this charm (the PC may not target herself) adds the PC's Performance score to his or her next sexual performance die pool. All parties involved in the proccess (the PC, the target of the charm and the partner with whom the target makes the sexual performance check) must be engaged in physical intimacy, but the PC is otherwise free to improve sexual performance checks in which he is not directly involved.
Note that there are both female and male versions of this charm, which characters capable of gender-switching must learn separately. The appropriate form of the charm depends upon the sex of the PC, not upon the sex of any given partner.

Henna upon Sweat-Slick Flesh Sutra

Cost: 5 motes, 1 WP
Duration: Variable, see below
Type: Simple
Min. Performance: 5
Min Essence: 3
Prereqs: Sensual Touch of Rain-Damp SoilSolarPerformance/Ecstatic Rush of the Untamed Stag

By inscribing a sutra and/or a meaningful design upon skin slick with sweat from physical intimacy, the PC may grant a chosen partner the PC's own score in an Ability or improve one of the partner's Attributes by 1 dot (up to the PC's own score or 5, whichever is lower). The effect lasts one day per success on a Dex+Performance roll. For each day that the effect persists, though, the target is at an additional -1 to Temperance checks and all rolls to resist sexual temptation. He or she will find it increasingly difficult to sleep and concentrate on long-range goals. The henna remains until the effects of the charm wear off, after which time it fades away within hours. This charm does not require actual henna, but it does require some way of marking the skin. The skill with with the sutra or design is executed is irrelevant; the PC's touch upon post-coital skin with the instrument is the real medium for the effect, thus the Performance rather than Craft roll to enact it.

Dancing Amid Flashing Lightning Technique

Cost: 4 motes, 1 WP
Duration: Instant
Type: Supplemental
Min. Performance: 5
Min Essence: 3
Prereqs: Sensual Touch of Rain-Damp SoilSolarPerformance/Ecstatic Rush of the Untamed Stag

The PC may physically attack an enemy or rival only to pull the attack at the last moment, replacing any damage with an agonizingly pleasurable touch. This charm may supplement Brawl, Martial Arts or Melee rolls, and may specifically be used in a combo with charms from those abilities. when an atttack supplemented by this charm is successful, it does no damage. Instead, make a Charisma+Performance check, adding all extra successes from the attack to the roll. The target may resist with Temperance+Socialize (and gains 2 automatic successes if he or she is not attracted by nature to the PC's gender). If the PC is successful, the target is stricken by violent lust for the PC. The target must spend a WP not to be physically intimate with the PC if and when the opportunity presents itself, and suffers the PC's Essence as a penalty to all social and attack rolls against the PC. This effect ends with the attraction is physically consummated. Note that this charm requires pre-existing animosity, rivalry or violence to function; it can't be used to seduce friends or strangers, only enemies and/or assailants. The Storyteller may wish to make this charm more effective when used on long-standing rivals.

Heaven Reflected in Blossoming Pupils Tantra

Cost: 10 motes, 1 Permanent WP
Duration: Instant
Type: Simple
Min. Performance: 5
Min Essence: 4
Prereqs: Dancing Amid Flashing Lightning Technique, Henna upon Sweat-Slick Skin Sutra

By attuning his or her movements to the very pulse of Creation, the PC may through physical intimacy open a partner's eyes to the workings of fate. First, the PC spend a permanent Willpower and makes love to his or her willing partner. The PC makes a sexual performance check, difficulty 6. If successful, he or she then rolls Essence. Each success on the Essence roll imbues the partner with 1 dot of Destiny (starting from 0; the PC cannot "stack" additional dots upon an existing Destiny Background, but may replace an existing score with a higher one by achieving sufficient successes). If, after this charm takes effect, the partner has sufficient Destiny to be eligible for Exaltation, and the PC scored 10+ successes on the sexual performance check, the partner may Exalt, but there is no way to ensure or otherwise alter the odds of this most rare and awe-inspiring occurence. The Storyteller has the final say, and is encouraged to allow an Exaltation only if it serves the story. This charm has no effect on an Exalted partner.