Bottom here. I actually prefer my bf to cum inside. Assuming you're all lubed up, relaxed, and have had a proper clean out, not only does it feel good having him pulsate inside you, but it also comes out a clean white on the toilet afterwards. It's actually easier to clean up than having to wipe cum of yourself or partner with a towel afterwards. As for it being unprotected, if you've both been checked, are clean, and don't whore around, having unprotected sex isn't going to give you STDs either.