Men care and worry about size because they know that a small 'machine' has disadvantages, and impacts their performance; plus...

"As the singular act through which Man expresses his highest creative essence, sex is much more than conjugal union..."

Expunge from your mind that elusive 'perfect-partner' checklist of yours and adopt the real world 'right-partner' mentality; and be happy ever after!

In sacred sex, the man sees his Woman as a gorgeous Goddess; and the woman sees her Man as a majestic Lord; as they blissfully 'worship' in the sacredness of the holy-temple.