'Bachelorette' Contestant Leandro Dottavio Denies Sexual Harassment Accusations

'Bachelorette' contestant Leandro Dottavio says former 'Bachelor' contestant Bekah Martinez should have done some research before publicly accusing him of sexually harassing women more than a decade ago ... when he was in college.

We got Leandro out in Encino Friday, and asked him about Bekah posting a bunch of screenshots alleging he behaved inappropriately with several women. The claims are numerous and pretty sordid -- Leandro ran through them with TooFab.

As for the allegation he sent unsolicited d**k pics -- Leandro says it's a flat-out lie, and he has a theory on Bekah's motives.