the resort holiday we've been bottling out of booking for 3 yrs

every january i open the website, every january i close it again... theres a couples only resort in the carribean we keep saying we'll book for our anniversary, the kind where its all clothing optional and theres a proper sexy side to the place not just nudism. we've done weekend trips in the uk to LS friendly hotels but never the full 10 days abroad commit. wifes ready, i think im the one whos worried about what happens if we get there and one of us isnt feeling it on day 3... what do you do, stuck on the resort for another week? anyone done one of these big ones and felt trapped? or is that just my anxiety talking