99.9% of my undies are thongs, of course! They don't leave lines and they end up where they start out....in the crack of your ass, no tugging, no fussing, hehehhehe.
As for guys....I don't find it particularly appealing. I mean, it's ok, but not necessary. I prefer to see a guy in a pair of snug fitting cotton shorts, y'know the shorties? GOD! THOSE ARE AWESOME!!!! Either that, or if it is MY GUY and we are chillin together just be free...nothing like a man with a nice TIGHT, DIMPLED ASS!!!! For the record, I don't find full frontal nudity appealing.....only if it is my guy and we are intimate, then BABY, BRING IT ON.
I own 5 pairs of boxer briefs and they are just for working out the rest of the time I wear nothing hate the constraints of underwear only wear them while working out to be polite to those around me.
No banana hammock for me, too uncomfortable. For ladies though...YES!!!! Hot stuff, especially if they're wearing a nice tight pair of white jeans....yummy.
Here's the way I see it: I have a bubble butt. Nothing stays "put" on me. I'd rather have a 1/4 inch worth of fabric collected in my crack than 12 inches. Besides, they take up less room in the laundry...
I don't mind wearing thongs. I wear a lot of tight pants/jeans so I don't like to show my panty line. I was questioned at my gym if I even wore any. I'm sure guys love to see their bedmate in something sexy. I think it's sexy. I don't think it's sexy on guys, I'd much rather see them in their birthday suit.