Adventurers, is there anything you used to believe when you first started having sex that you now have a totally different frame of mind about? Anything you used to think was a “sure-banker” rule that you are now slightly embarrassed that you ever saw that way? What was it? Never giving blowjobs? Never doing doggy-style? Never letting yourself get sweaty during sex? Oh. You won’t tell me till I tell you mine? Fine. Sigh. Don’t laugh, but here goes: I …