huge
Explanation
This comic features a modern man enthusiastically describing male beauty standards to a bewildered 19th-century gentleman (suggested by his mustache and vest). The modern man exclaims: "Huge huge hairless muscle-tits. The bigger the better. So, SO masculine."
The caption below reads: "Pectoral muscles would be the hardest male beauty standard to explain to a 19th century person."
The joke centers on how contemporary male fitness culture valorizes enormous, hairless, highly defined pectoral muscles -- and how bizarre this would sound to someone from the 1800s. The modern man's enthusiastic description of "huge hairless muscle-tits" is deliberately phrased to sound as absurd as possible. From a 19th-century perspective, when the male ideal was more about bearing and composure than sculpted, shaved musculature, the modern obsession with massive pecs would be genuinely confusing.
There is also an ironic undertone: by describing pecs as "muscle-tits" and emphasizing that they should be as big as possible, the comic highlights how the modern masculine ideal essentially involves men growing a body part that resembles breasts -- something that would be very difficult to frame as "masculine" to a historical audience unfamiliar with gym culture.