Do you argue that? Or just a generic ‘one’?
In novel section, the covers on BL work show landscape, a single male, wolves and hands as often as they show the leading couple. Because, well, novelists don’t draw all that often, and Internet is not overflowing with the copyright free art of two kissing males.
Unless you want both lovers to hold their arms firmly pressed to their own hips or be of the same height, they will be embracing one another, and either facing the reader or looking into each other’s eyes to convey that they are in love.
Actually, maybe it is better if you show the examples of the covers that have two lovers on it that you like?