Some people do it, but most people don't do it. You should certainly not participate in such activities unless you yourself want to do it. Do not feel compelled to do it just because your boyfriend wants to do it. You have the final voice on what kind of sexual activities you want to participate in.
On the issue of watching porn, you could certainly do it together with your boyfriend. But you should be aware that porn does not show normal sex. Just as one example, real women usually are quiet during sex. The kind of moaning that women do in porn movies is not the way real sex usually is. And most people do not participate in anal sex, which is common in porn movies.
