While I'm not going to assume that a man's feminine features actually say anything about his worthiness as a partner, I will weigh in on what I believe to be the more superficial pros and cons of dating less-manly men.
Pro: Full lips, defined by the study as a feminine feature, are fun to kiss!
Con: It can be confusing to date someone who's "prettier" than you are.
Pro: You can share a stylist. Remember when Gwen and Brad had matching highlights?
Con: He uses your pricey beauty products instead of his basic Pert Plus.
Pro: He's well-groomed.
Con: You have to draw the line at eyebrow waxing. Taking care of the unibrow is allowed.
Pro: You can eat his fries because he's watching his figure.
Con: You always end up eating his fries.
To see the rest,
Pro: He might be more willing to talk about his feelings.
Con: If you don't want to hurt them, you have to be careful what you say.
Pro: You don't have to worry about him spending hours in the gym lifting weights with his bros.
Con: Let's hope he's at least strong enough to open a stubborn jar when we don't want to.
Pro: He gives attention to his sartorial choices that complement your fashionable look.
Con: Too much high maintenance is a turn off — for a man, or a woman.
Do you have anything to add?