it really wasn't necessary to see every single snowball but was quite hot to see her sucking of many strangers, not just 1 or 2 and, after another. So reminds me of my wife when we would go to the glory hole. I'd just let her go and have her fun while I just watched, maybe jacked off once, or twice, and when she had her fill I would take her home and fuck the hell out of her for the next 3 days..
she knows how to masturbate a penis as it's ejaculating..release hand pressure on the down stroke, re-grip at the base, pull stream through, repeat until empty. (Holding/kneading nuts during process optional but highly recommended..