The facial hair of men

What happened to the mustache? When I was younger, many men had mustaches. Now there are goatees and beards - but they have evolved. Big bushy beards seem to be out - and finely trimmed beards seem to be in style. Maybe it is because of the advent of fancy quadruple blade razors? There are some mustaches that I think look really fun - but very few people have them. Like the mustaches that curl at the end. Why don't more men keep those? Maybe they are difficult to maintain - perhaps you need some special mustache hair product to keep the curl. But I do see some burley men who clearly are banking on playing Santa in shopping malls come December since they keep long thick beards. I wonder about those fellows - how do they keep their beards clean? What a mess if you are eating an ice cream cone and get some ice cream in your beard! Is there special beard shampoo - or do you just use regluar shampoo? Or soap? Do you need to condition? Does the beard need to be brushed or combed? You don't want knots in that!