Lifting purely for aesthetics or for women is never a good idea IMO, as you should rather have some sort of warrior ethos seared into your mind as you grind yourself through the gym (don't pedestalize bitches, don't disrespect yourself by making a grueling workout dedicated to them), but it is undeniable that getting sex is one of the reasons many men lift. Lifting raises your SMV which in turn gives you more sexual options.
However, to maximize your appearance low body-fat is key. The lean 175lb guy at 10% body fat with that chiselled jawline and sunken cheeks is going to do better with women than that 210lb guy at 17-18% body fat with a puffy face. Don't be the permabulk 20% bodyfat bro. Everyone can bulk, but cutting is what separates the mentally strong from the mentally weak.
As you lower your body fat you improve your facial aesthetics by chiselling out your features. Your fat dissipates from your body in a global way, rather than through spot reduction, although some deposits deplete faster depending on your genetics. It's no secret that the vast majority of male actors, models and sex symbols are all low bodyfat. Even the ones that are above 200lbs (Statham) have chiselled faces and low bodyfat. And the common thread amongst all models, male to female, whether they're muscular and buff or simply normal framed, is their low bodyfat percentage.
As you can see above, facial aesthetics improve a lot as you go down in bodyfat percentage. Many guys tend to put fat on their faces as they bulk, and this will lower your SMV steeply until you cut back down again. Women can often get away with chubby faces (they naturally have more estrogen, which results in chubby faces), but men cannot as an angular face is a signifier of testosterone. Further, adipocytes generate estrogen (antagonizes testosterone), and so when you are at a lower bodyfat percentage, you are also generating less estrogen/estradiol (no man boobs).
My next post will focus on the best ways to cut bodyfat, the simple science behind it (calorie balance), and my personal experiences.