What is the evolutionary reason for men to enjoy blowjobs so much? Shouldn't we not want to get blowjobs and want to fuck her pussy instead? Why do we (or I, not sure how many others can relate) find it so satisfying to cum in her mouth?

I've read 'Sperm Wars' by Robin Baker and he gives a reason for why women should enjoy giving blowjobs. He argues that it gives them a chance to taste our dick and make sure we don't have diseases. To a lesser degree, it might give them a chance to check for infidelity, if they can taste another womans vaginal fluids on it. This should cause women to enjoy giving blowjobs and men to want to avoid them.

In practice however, I find that men enjoy receiving blowjobs much more than women enjoy giving them.

Online searches give useless results.