His penis and your vagina might not always match up perfectly. Health, and Your Best Sex Ever, to find out if a penis can ever be too big for.
The beauty of a man with a thick penis is everything. If it's still too much, you can back off a little by pushing your legs together a little.
I had a partner with a micropenis, and then my current partner is so large he has to order his condoms online because he can't find any to A really thick dick. If it's too big to fully enter a woman, that can't be fully satisfying.