Yeah. I remembered that it was terrible and I thought it was a funny (and family-friendly) one at first and I was trying to enjoy it until... well... those sexual stuff happened, followed by other horrible scary moments (as far as I remember whatever happened to that 'thing' seconds later was... awww).
Now, this:

I'm not sure how obscure this is but I think it has not appeared in this thread yet. As I have mentioned I rarely watch movies so my knowledge on them is very limited. I only watched this on TV one day by chance. It seems to be a very high budget one, but the
whole thing is horrible (hint: NOT Waterworld).