We found that at sex clubs men will just offer their cocks for May to suck. They might be standing there, watching her and stroking their cocks, and she'll offer to take it into her mouth. They'll enjoy it, but want more, or use her as a "fluffer" to enter another woman. Or May is otherwise being used, like she's on her back and I or another man are fucking her, and her mouth is all that is available and they'll use it to pleasure themselves for a bit.