Well, pardon my X-rated response, but here it goes.
Amongst the primates in general, one characteristic of a female in heat was that the vaginal lips swelled and turned more red. In our human history, the first recorded use of lipstick was in the Middle East and was worn by women who were prostitutes. With human females, the same thing occurs as with other primates but is far less conspicuous, however the "message" of red lips appears to have not left the male subconscious.
I'm not sure I buy the "red lips = a big vajay-jay cue" idea.
But, it's a good argument to make.
That's OK, and maybe you're right. OTOH, we do know there's an attraction, so what was just researched really isn't anything surprisingly new, plus we have to remember that we share so many personality characteristics with the great apes to begin with, although I'm sure that really is an insult to them.