Having a high or low libido is down to genetics. It's not just a mental thing. And wtf "as opposed to any decent sort of grounding" what does this even mean.

And there is nothing wrong with casual sex. You don't have to take sex seriously, isn't that great? I mean, be responsible, use protection, obviously, but it doesn't have to be all "only with your true love" etc. And it especially doesn't have to only be with someone you're married to. That is so much bullshit. Having casual sex or sex outside of marriage =/= "mentally/emotionally damaging."