As a man who owns a lot of large sized shirt I tend to let them all hang out. I don't like going the tuck. Though it kind of looks like Sharon's netball skirt over trackie daks (from Kath and Kim).
Today I went the tuck in. Not sure why. Maybe my pants and belt are conducive to wearing it tucked in.
Two things I noticed.
One - I was paranoid I'd spotted the front of my pants after going the wee and didn't have the benefit of my dust ruffle to prevent that being seen.
Two - I was constantly checking my fly was done up properly.
I don't like the tuck. Back to untucked I think.