Mainstream astrology, no. Most horoscopes you'll find on the internet are based on the zodiac sign that your sun was in on the moment you were born. But when you dig deeper, do a natal chart for example, you will get a pretty accurate description of who you are.
It will show you the zodiac signs all of the planets in our solar system on the exact minute you were born. Different planets rule different aspects of your personality.
The sun, for example, is the planet of the Self. The moon = emotions. Venus is the planet of love and relationships. Mercury is the planet of communication. Mars is the planet of action, and so forth.
From a scientific standpoint, it IS in my eyes plausible too, when you take into account how much the moon alone influences the tide of the ocean here on Earth. We are beings made of water, and our brains are encased in water. Why SHOULDN'T the planets at that time influence that? We have no way of measuring that yet either, so nobody can say it's fake or real. Dig deeper into astrology than your newspaper or internet horoscopes on buzzfeed/whatever, you'll find it to be very interesting
A real soulmate is that person who sings and rejoices with you through your good days and stands by your side through the valley. Call him or her a good friend or a romantic partner as long as there is total understanding, mutual respect and unconditional love between the two or more if you had soulmates.
As for everything else in life, I can only speak for myself. When I'm looking to sext and more polite than most of those rude people that you speak of however I think you adequately answer your question for me it is more about connecting with somebody the relationship between two people even if it is just for sex then just the sexting.
It is more important for me to make a connection with someone did have a brief relationship even though it pertains strictly to sexting it is better than being alone on a porn site although that is preferable to some of the assholes I've run across.
I hope this adequately answers part of your question.
if you would like further info or had more questions I'll be happy to discuss this with you.
Hit me up anytime I'm a real human being it's not just about the sex.