Watch out boys. Paris is single again, and the human semen recepticle is wasting no time spreading her cooties — among other things — all over town.

Paris Hilton was spotted in a sensual liplock with soccer star Cristiano Ronaldo less than 24 hours after just used her publicist to dump her noodle-noggin ex Doug Reinhardt.

The socialite reportedly spent hours “swapping spit” with the handsome athlete after they met at Los Angeles club MyHouse on Wednesday night.

A X17Online spy spills: “Cristiano and Paris were all over each other swapping spit the entire night! His table needed every waitress in the building to service the large quantities of alcohol, and he spent in excess of $20,000 on champagne and drinks.”