When I was young, I was lucky to have a GF who regularly gave me oral to completion. Once she got used to the taste, she had no problem with CIM and swallowing the lot.
Because of this early experience. swallowing has never been a big deal for me. If a WG allows CIM, I'm happy as long as she doesn't stop while I'm in the midst of ejaculation. Beyond that, I don't care what she does, swallow, spit or run to the bathroom. My pleasure comes from my body, not in watching what she does with the semen.
If she only offers OW, I don't mind either. In fact, if I've been giving a hard pounding I prefer it to OWO if my dick is feeling sensitive.