in courting we are advised to truly....

[Archaea]

if you have a great relationship, "compatibility" works itself out.

If you're not in good relationship, then it will worsen. The "compatibility" issue can be seen from two angles, "physical" and "emotional".

Peoples of disproportionate proportions in relation to one another might not be good fits. Figure it out when you're dating. A 400 pound man and a 90 woman probably aren't a good fit and you don't have to have sex to figure it out. Common sense.

Emotional. Figure out your true abilities at communicating, and any "sexual differences or difficulties" can be accommodated.

In reality, it's more about the guy listening early on so her experience is positive. Reversing negative experiences for the woman are almost impossible.

Four words, which if followed could avoid a lot of trouble, "let her go first." Study female anatomy. She should too. Too many gals are too ignorant how they function. Relax and don't worry about it. There are other more difficult trials than this.

That won't mean, you won't run into the fifty percent of women who afte a while just can't be bothered, but if you give your all, what else can you control. Don't set your expectations too high for her and control things within your control.