In practical terms doms go after subs, but that's only a generalization. I've received what might be termed "an expression of interest" from subs in the past, yeah sometimes from a dubious source, but in other cases they were genuine and heartfelt. For one reason or another I wasn't able to follow up, but in at least one case I gave it serious consideration.

And then there was the case of the sub who chased me down a week after a casual conversation on IRC. She made it plain she was interested. In that particular case I was tempted too...and wound up marrying her 8 months later.