Rather than going directly to your boss, does your company have an EEO officer or a HR department you could go to?

makes inappropriate comments at times about females ---sexual stuff---when telling stories to "entertain" or impress people. Dino likes people to know that he reads/views porn too.
That's the stuff that unquestionably makes a hostile work environment based on sex. The stuff about your last name is in there too, and I totally get how offensive it is to you (having been through some similar things before... decades ago ); but the expressly sexual stuff is what an EEO officer will definitely have heard before and have protocols about.

I can wish that you'd be comfortable reporting the guy for your own sake, but since you're not, are there other women at your workplace who've heard his comments? Do it for them. You could say to your boss (or to your EEO officer) "the company's going to get sued if this isn't taken care of." And it would be the truth. If your boss doesn't straighten the guy up, go to her boss.