That's a nice intend you have! For that Listen My important advice!...if the Strangers sign you to Cum, than the very Best behave is to move forward, so the Penis is deep in your Mouth and let him stay there, till the last Stream! - No giving Back!
I would get so excited as I dressed up in black lingerie outfits with either crotch less pantyhose or thigh high stockings then hide my outfit under a two piece warmup to go to one of the many adult stores in the area. There I’d spend hours in a arcade booth sucking cocks through a glory hole helping strangers get off, the whole time building up my want for a big dick to appear, looking to suck it so good that when I offer up my ass if he’d meet me outside rarely turned down building up my book of numbers because I’d try to be the best no hassle mouth and ass to be regular fucks.
There used to be a gloryhole in the sex shop round the corner from me in Hamburg. The woman that ran the counter was very obviously a butch dyke. However, if you were in the booth, getting your cock sucked, you could signal to her from the booth, and she would come close, and show you her ass and pussy until you came. After you came she used to look at your cock and say "pathetic!". Lol.