I always felt, even before I got pregnant, that it's better to accentuate your curves. A lot of women try to tuck their butt in or kind of slouch because they're trying to hide. Obviously, you can't suck it in, but it's important to really show off the belly.
All girls like guys who are tough. Obviously, riding a motorcycle - I don't want to say that there's a bad boy quality - but there's definitely a tough and macho thing about a guy who rides a motorcycles and that element of danger. That's really sexy.