The way we see it, your 40s are your best decade—period. You know who you are and you know what you want. Stay out late, sleep in, eat any food you like, behave badly on a night out. Want to go for a career that requires logging long hours, tons of travel, or moving to another country? Plus, when you take a trip by yourself, you get to choose the sightseeing spots you prefer without having to worry about what your partner wants to do. Dating might seem like a chore, but it can help you expand your social network and could even end up being fun.