Actors who refuse to do love scenes

Not always easy to be romantic/intimate on set when you have lights, cameras, personnel, etc. around you.

Ralph Macchio is like that, but it's not faith related. He just loves (fears?) his wife too much. That's why Daniel got friend-zoned in Karate Kid 3. I remember on Dancing With the Stars, he was constantly pissing his pants over dancing with another lady.

On that note, Jackie Chan didn't even have his first onscreen kiss until he was 48. Not counting whatever he did in those old adult films.

Stallone also showed his bare ass when getting hosed down in First Blood.

I'm sure any man would for early-to-mid 90's Sharon Stone.

Sharon Stone and Bruce Willis.  Catherine Tramell and John McClane together.

In regard to the OP, it apparently wasn't so much devout Catholicism as uxorious devotion that caused McGoohan to spurn romantic roles (in fact, he openly and rather impatiently mooted the religious reason in a couple of older interviews; although he remained a faithful adherent of the church, he apparently felt some conflicts with his religion as well, as his work often expressed, albeit symbolically). He said more than once that he was uncomfortable with the notion of having his young daughters see him passionately kissing a woman who wasn't his wife, and also intimated that he'd seen enough marital breakups engendered among his colleagues by their becoming romantically involved with a co-star.

In a couple of his early Rank Studios films he'd kissed his actress co-star--in fact in one of them he played an evil character who not only kisses the girl, but proceeds to attempt to rape her. And in his old Dangerman series, he wasn't above generating some erotic heat with a lovely lady, but it was always of the strictly flirtatious and hands-off variety. All in all, I don't think he was so much opposed to sex-suggestive scenes on moral grounds as much as on the grounds that most of those types of scenes were gratuitous, and often as not degrading to the women involved.

Interestingly, Brooke Shields, who bared it all as a young pubescent in Pretty Baby, insisted on a body double for the nude scenes in Blue Lagoon when she was 14, but then went on to do nudity and fairly heated lovemaking scenes in Endless Love at age 15. As far as I know, she did no nudity or even particularly explicit love scenes after that film.

I seem to recall an interview with director David Cronenberg (or maybe it was one of the actors) from some years ago, about McGoohan working on the film SCANNERS... Cronenberg (?) said that while McGoohan was a marvelous actor, he was also a total pain in the ass to work with. At one point during the shoot, McGoohan tore into co-star Jennifer O'Neill, angrily calling her a "slut" and a "whore" (in front of the crew) because she had been divorced multiple times. O'Neill fled to her trailer in tears.

I'd never heard that particular story, but it seems true enough that he was sometimes difficult to work with, and apparently beset by some private demons. He seems, all in all, to have been a complex and complicated personality; perhaps not the type of personality that could easily fit into the demands of 'leading man' persona--which could be one major reason behind the fact that, magnetic and charismatic as he could be onscreen, stardom in films evaded him even though in all respects he might have appeared to be tailor-made for such stardom otherwise.

I've read a lot about him, I find him a fascinating sort, someone who might have achieved more in his career if he hadn't been warring with the twin issues of his personal morality and philosophy and his apparent near total inability to let himself be molded by the starmaking machine.