Girls, MFM Threesome: Is penis size an issue?

Anonymous
So, a friend of mine asked if I would have a threesome with her and her boyfriend. I have nothing against threesomes, I already had a FMF and it was awesome. The problem is that this boyfriend is the only guy my friend had sex with and he's well hung. Once we were drinking together and she mentioned that he's about 8 inches. Now, I'm pretty average, slightly over 5 inches. Do you think it will be an issue? Would that be a problem for you? Has anyone here had a similar experience?
Girls, MFM Threesome: Is penis size an issue?
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