Having read some of the rantosphere on the subject, I have two comments:
(a) If you have to ask why a condom on the dildo, you need a refresher course in safe sex. Granted, in this case, it didn't help, but no one is claiming this was suicide -- just an accident.
(b) If you have to ask why two wet suits, you need a refresher in, er, something. See, not my thing? But I understand it's all about sweating.
Dude needed close friends he could talk to about these things he was into. And have a monitor. Please. Be safe, people.