The 'theology of the pelvis' as you call it is levied against Catholics or anyone who opposes the laissez-faire attitude towards sexual behaviour. It is a common ploy to accuse those who oppose any immoral, sexual behaviour of being obsessed with 'sex'.
The most vicious attacks made upon the Catholic Church are against her teaching upon Faith and Morals and especially, almost solely on Morals. For this reason the Church is continually called to defend her teaching in this arena. To turn around and insinuate that the Church is obsessed with sex is absolutely wicked.