Evolution of Love 2

Sense of smell

"Latest Covid joke"
*I went for a walk with my new girlfriend and we saw dogs mating . She said : How does the male know when the female is ready for sex ?*
*I replied : He can smell she is ready . That is how nature works .*
*We then walked past a sheep field and the ram was mating the ewe . Again my girlfriend asked : How the ram knew when the ewe was ready for sex ?*
*I replied : It’s nature . He can smell she is ready.*
*We then went past a cow-field and the bull was mating the cow .*
*My girlfriend said : This is odd . They are all at it . Surely the bull can’t smell when she is ready .*
*I said : Look , it’s nature . All animals can smell when the female is ready for sex .*
*Anyway and after the walk , I dropped her home and kissed her goodbye . She said : Take care and get yourself checked for Covid-19 .*
*Surprised , I asked her : Why do you feel that way ?*
*She said : I think you seem to have lost your sense of smell ...*