Recommendations for novels/series where the protagonist literally has a magic dick?

It doesn't have to be literal magic, just something where a subset of the main character's abilities are either built around sex or used for sex. This is as opposed to series like Wild Wastes or Scholomance or Remnant where the MC purely derives power from having a harem or is just a badass at fighting.A couple of examples that I have already read:

• Three Square Meals by M Tefler is probably the biggest example I am thinking of, where the MC's alien physiology affords him a ton of advantages in sex.
• the Daniel Black series is a lesser example of this where the MC's flesh magic isn't based around sex, but he still uses it for that purpose often.
• A couple of the branches in The Gamer on CHYOA had examples of it.

Thanks!