Constellation match.
I've always kinda believed in horoscope, and since it's such a huge topic now, I went to do some research.
Website #1 :
Sagittarius Man and Pisces Woman It is not very easy for a Sagittarius man and a Pisces woman to carry on their relationship comfortably for too long. Some basic differences, if not settled in time, can lead to disastrous results, even though the chemistry between the two is great. She lives in a dreamy world of her own, where only a few others exist. He, on the other, lives in the real world, interacts with real people and loves to be noticed and admired. His flirtatious nature and lack of commitment will make her insecure and her too-much attachment will make him feel bounded.
Website #2 :If the man in this relationship is a Sagittarius, and the woman is a Pisces, this relationship might be best as a short fling, than a long term match. Though the physical attraction is there for both of you, and very strong, you two might just be too different to make this work well. He likes to be the center of everything, and is always on the go, quite a free-spirited doer. She likes to dream about the things she wants to do, and is more than happy to let them stay as dreams. He won’t understand this, and in fact, will be frustrated by it. He is not into cozy nights at home, something that Pisces women dream about, and he needs to be around people to be really happy. He also happens to be a huge flirt with every girl he comes in contact with, and also has the reputation and ability to cheat on his girlfriends. This is not comforting for shy, withdrawing Pisces. There can be little security or trust between the two of you if that is how he lives.
Best match for Pisces? Cancer/Scorpio/Pisces.
---
Those stuff about the Sagittarius man and Pisces woman? Mmm interesting.