The third letter sounds like someone who's been in jail, had someone get him/her get off or the other way around.
Now thinks this 'having no choice BUT because being in jail' doesn't mean anything.
Well it does. It means that there is this HUGE HUGE HUGE gray area when it comes to sexuality.
The Homo/Bi/Hetero is indeed one spectrum. These are fairly commonly recognized identities in that ONE spectrum.
Yes, getting yourself off in jail or a submarine (or wherever it is you are or imagine yourself to be) is in that same spectrum.