Nah, it's called basic logic skills and comparing similar situations so you can see how stupid and illogical you sound.
"She could be getting fukked by a lesbian and I could slide behind her when she ain't paying attention and make her nut, is she gay then?"
"He could be getting his dikk sucked by a chick, while blindfolded, and then a man could come in and finish you off to make you nut. Is he gay then?"
Liking an intimate act with the gender you're sexually attracted to doesn't mean you'd like the same intimate act with the gender you're not attracted to.
Just because she likes the feeling of being penetrated doesn't mean she's sexually attracted to men. Her sexual attraction is all that matters when it comes her sexual preference.
Gaddamn the supidity is on surplus today
One act is natural and in line with the laws of nature, the other one is disgusting filth.. which one of them seems to be disturbing your spirit so terribly
fakkit
EDIT-
I know you're probably still confused, so let me break it down real good and plain for you mkay?
You can't take my scenario of:
2 ppl engaged in a homo act until a 3rd comes along and makes it hetero ("what if I switched with her girl and made her cum, will she still be gay")..
..and equate it to:
2 ppl engaged are in a hetero act until one comes along and makes it gay ("what if i was getting head and then they switched the female to a male and I still was pleased, would I be gay")
It's two completely and totally different circumstances, worlds apart, and only a sick fakkit ass mind would equate them to bring them together
