Flabort you're already hitting a few psuedo-science talking points.
Theory in the scientific world means "body of knowledge", not "unproven idea". Gravity is a theory, that doesn't meant that it hasn't been thoroughly tested.
Also saying something "cannot be proven" is... not wrong, but not exactly how science works. Science is about taking a hypothesis that can be disproven, and then doing a test that could disprove it. So its not finding fossils and saying "well this looks like old animal corpses, but its not enough evidence so w/e". Its looking at fossils and saying "I think these are a million years old, let's carbon date them and find out."
So in regards to evolution, its "I think we evolved from these mammals, let's compare our genomes and find out." And other tests, that one's just an example. Of course, that kind of thing can't 100% prove evolution, but nothing can ever be known 100%. Good science never claims to definitively prove anything, because science is based on the idea that anything can be questioned, including scientific findings. Instead science is a vehicle for tying down what has been observed.
Also re: Tahujdt, its simple. "Abstinence education" is code for not explaining to kids how to properly have sex, so that they won't. Also yes, abstinence doesn't guarantee a lack of pregnancy but generally that would involve rape so its an irrelevant argument. Or I guess pulling out but its a very dumb definition of abstinence that includes that.