John Singer Sargent lived a life so scandalous that he had to leave London after doing "Portrait of Madame X." Bisexual, prone to diddling Venetian gondoiers and the male domestic help, erratic, and temperamental, he fit a lot of observers' concept of what the "artistic type" should be.
Sketching men sprawled across beds was something of a specialty with Mr. Sargent.
I can't remember if this is the valet or one of those gondoliers.
When he wasn't busy in the bedroom, he could do this.
I'll leave you with a self portrait.