Seriously, folks! Marty needs our help in this matter but can't bring himself to break free of the emotional straightjacket that is constraining his libido, whatever is left of it in his advanced years.
Mind you, it could be due to the massive number of alcoholic binges he's gone on when not restricted from doing so to remain gainfully employed. Or maybe the last real attempt at love in Rosarita massively damaged his ego. Whatever it is, Marty, know this: We are here for you, man. To help you get your mojo back.
Here's another avenue you might consider exploring. To find a female soulmate.
https://www.meet-an-inmate.com
Go for it, buddy! There's a special lady there waiting to hear from you!