Just gonna throw my hat in the ring here. I once had a friend whose penis WAS a footlong. At least. He could not perform well sexually, I don't know if there was anxiety or it was something physical (this was decades ago now), but he did not consider his size a blessing. It's not an isolated aberration. I knew another overly endowed man. More than a friend. Rare is the woman who can truly handle such a thing. I certainly wasn't.
None of this is what Adeline is referring to, though large breasts can be somewhat of a sexual impediment. I'm not going to bother telling you about the actual physical ailments that can result, this info is easily researched or you could ask an actual woman. Good luck