If you can't tell from my username, I have a thing for Tighty Whities. I love how dorky it looks and is oddly hot especially when a guy has a bulge and it feels like their showing it off.
I don't get why guys stay so quiet when it's just the two of you alone. Come on fellas, moan out loud, it'll enthuse your partner and yourself. Also it helps you get out of your own head so you stop worrying about performance issues, focus on yourself and partner, and live in the heat of the moment.