Not all parts of romantic relationships are romantic — some are more logistical. Many couples have regular admin nights, for example, including 41% of Gen Zers, 33% of Gen Xers and 30% of Millennials, according to a recent survey of 919 partnered U.S. adults by matchmaking company Tawkify . Among the tasks they tackle are paying bills , budgeting and expense tracking, travel and vacation planning, meal planning, grocery management and scheduling . While managing groceries might not sound like the most fun a couple can have, the effects on the relationship could be pretty positive: 78% of couples who consistently schedule admin nights say it has improved their relationship satisfaction. That's not surprising, say experts. "Admin meeting is one of the rituals I always assign to my couples," says Sara Nasserzadeh, relationship expert and TED speaker who recently gave the talk "The 6 Essential Ingredients of Loving Relationships." Here's why.…