Sthenolagnia (Female Muscle Growth)

Defined:

Sthenolagnia is a fetish characterizing those who derive sexual arousal from muscularity, or demonstrations of strength.  This fetish occurs in both men and women, but its primary focus is on muscular women. 

Explained:

Sthenolagnia, and its subset of Female Muscle Growth (FMG) is a fetish that involves muscular growth of a woman. Most Female muscle growth fetishists are very attracted to female body building. FMG fetishists often have fantasies that go beyond the admiration of women with muscles. They are often very aroused by images or video depicting women who’s muscles grow at unnatural rates. Many fantasies include the concept of a woman’s muscles growing in size with her level of arousal.

Representative Porn:

Much of the erotica associated with this fetish involve manipulated images, video, and animated gifs depicting the woman’s muscles growing or expanding.  The most common body part erotisized with this fetish is the bicep. The following excerpt is taken from an article where a FMG enthusiast describes his fantasy.

I’ve had the same combo fetish since I was at least 5, before I could even recognize it as something sexual at any rate. That alone has to be abnormal . . . but at anyway, I can’t orgasm unless I’m at the very least picturing in my mind a woman with extremely huge breasts AND extremely huge muscles that actually swell and grow with sexual excitement.  Part of the thrill seems to be in these “parts” (particularly the breasts, pectoral muscles and biceps) growing and bulging to utterly insane sizes sometimes in the range of buildings, continents, or even planets depending on how far I let myself go.