Most males won't enjoy that because it's another man , something they don't want to be a part of, but as the poster above me pointed out, if the guy doesn't know it's a male, the physical pleasure will still be there.Okay, so if another man sucks your penis, you will enjoy it, correct?
Now a lesbian who uses a Dildo or a strapon or other marital aids, knows it's not a man's penis, and doesn't use it because she wants a man in her, she uses it for the pleasure the penetration gives, but any other sensations the dildo may have (such a vibrator)
The same goes for a straight male who enjoys prostrate stimulation , whatever they use to stimulate it,a finger or device made for that purpose does not mean he wants to have a man in him.