Enlarge/Reduce (genitals)

You cause a creature's genitals you can see within range to grow larger or smaller for the duration. Choose a creature. If the target is unwilling, it can make a Constitution saving throw. On a success, the spell has no effect.

Enlarge. The target's genital size doubles in all dimensions, and its weight is multiplied by eight. This growth increases its size by one category-- from Medium to Large, for example. If there isn't enough room for the target to double its size, the creature's genitals attain the maximum possible size in the space available. Until the spell ends, the target also has advantage on Strength checks and Strength saving throws using their genitals. They can use their genitals to make unarmed strikes, dealing 1d4 bludgeoning damage on hit.

Reduce. The target's genital size is halved in all dimensions, and its weight is reduced to one-eighth of normal. This reduction decreases its size by one category--from Medium to Small, for example. Until the spell ends, the target also has disadvantage on Strength checks and Strength saving throws using their genitals.