No, Luke, I will not be your Father! 

Also known as Paternity Prevention, Cum Cancelation, Mating Mitigation, Stalk’s Bane, Luna Worker’s Guardian, or simply, Sperm-be-gone. 

You touch a willing creature throughout the casting of the spell. The spell can be cast on males or females but the creature must be able to reproduce sexually. 

A faint barrier of weak but stable abjuration magic forms around the creature’s reproductive cells. For the next 30 days, the creature can not inseminate or be inseminated. The spell has no effect on Undead or Constructs. 

In addition, once the barrier magic is in place, the creature has advantage on saving throws against sexually-transmitted diseases. This benefit alone cannot be given to a creature that would otherwise be immune to the spell. 

Author’s Notes: Anyone find it odd there is no contraceptive spell in D&D? No? Just me then. Well regardless, here it is. It seems like such an obvious use of barrier magic to me, I’m amazed no one thought of it before; after all, in a fantasy/medieval setting, modern condoms are unlikely to be a thing yet. Wizards to the rescue! (Again, lol). Now all you slutty PCs (yes, Bards, I’m looking at you), can get your groove on without fear of more permanent repercussions. Ever tried to fight a troll while pregnant? Didn’t think so.