TMI. But help me

So I know this is weird and all maybe more so to some of y'all. But my boyfriend is making it pretty clear to me that he wants me to play with his butthole. I know it's weird ! But someone help lmao. I want to do it because he wants it but I can't get over the gross factor of it. And I know there's pretty much like a "G spot" there. But i dont know if I can do it or not. I'm laughing while typing this because I know it's odd and funny but I know someone out there has some answers for me. So please no rude or obnoxious comments. Just looking for answers