Not a well-known fact, but phlebotomists (those who take lab samples, such as blood from your arm?) will check out senior men's dicks and prefer to draw from a good, easy vein than risk collapsing one or more veins in the inner elbow, back of hand, or knee of a senior gent. Working my way through college as a lab assistant and then a lab tech, I would explain to older gents how much easier it would be for them and was never told "NO!" So, a niece veiny dick has more than just physical charms.