In my early to mid teenage years I was prone to suicidal thoughts. I blame a combination of hormones and antidepressants. I would constantly think about how I was going to have to die, and I would contemplate whether living is even worth it. I was going to have to die and so were the people I loved. I thought that maybe if I killed myself then it would save me the trouble of losing the people I love most. After getting off of prozac the thoughts didn't go away, but they didn't draw the same reaction I had out of me. I promised myself I would live the happiest life I could with all the time I am allowed to live. I think ultimately what happened was that I had lost sight of the future. Viktor Frankl saw an individual losing sight of the future as giving up the will to live through his experiences in a concentration camp. I can say that I agree. At this point I have matured a lot and I understand the value of life. I wouldn't say that all NFs go through this, but I would say that it probably is very common among NFs.
A friend of mine killed himself a couple of years ago, and after seeing a church full of people crying over the closed casket of a 19 year old I understood even more why suicide can't be the answer.
I wouldn't say NFs are the most sensual; more like the most romantic, which is closely tied to sensuality I guess. Keirsey says that: "NFs can be deeply divided about their sexual feelings... They insist that sex must be an expression of love rather than lust." I personally agree with this, but I've heard from NFs that don't identify with that statement wholly. Sex with the absence of love is a waste of my time. However, if the "in love" criterion is met, I wouldn't underestimate how sensual an NF could be.