If you only come through having sex why are you going to massage parlours for HE, what are you trying to prove to yourself or cure?
Why not use the same money and have sex with an escort or walk-up girl?
Can you easily and quickly wank to completion when alone? Do you need any particular porn to enable that or can you trigger it by just imagining something?
No need to reveal all just consider your answers and find the associations with you blowing your load.
Similarly, if you have sex with someone can you release control and come quickly, have you noted what the triggers are and if they are thoughts or sensations you feel regardless of the partner present or rely on something your partner does or you do to them or if you need to believe in some emotional connection?
Again no need to share just consider what you can do about the realisations you come to and whether paying for sex is actually helping.
You may be able to work on what that awareness surfaces for you by yourself or you may want to seek professional help if you're really that worried or indeed if others are on your behalf.
If you can't be arsed with nailing your psycho-sexual self then you could try:
1) prostate stimulation
2) being pegged
3) BDSM, so many levels as dom or sub, giver or receiver
4) attending to any bi/homo-sexual urges you have, get a male masseur to wank or blow you.
5) try tantra
6) other kinks... although preferably turn yourself in if any of it involves violence or non-consensual abuse towards other humans or animals.
