Do you care about your significant other's sexual past?

[Esquilax]

This. If I'm willing to leave and not marry the man I love because sex hadn't been amazing initially, then how can I promise him to be by his side in sickness and in health if he gets paralyzed and unable to have sex after we are married?

Here's the thing: sexual compatibility is kind of a big part of a relationship as it's growing to the point that you'd actually want to stick by him through paralysis.

I hope that doesn't sound dismissive of your point because I'm not trying to be; actually what you're saying is very relevant to my own life, as my wife is sick and often physically can't have sex for extended periods of time. What I'm saying is that you have the order of things a little backwards, in that sexual compatibility informs the relationship, it's not an appendage of it. It's one of a collection of factors that should go into the decision to spend your life with a person.